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CHEBI ONTOLOGY - ANNOTATIONS

The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at http://www.ebi.ac.uk/chebi/. The data is made available under the Creative Commons License (CC BY 3.0, http://creativecommons.org/licenses/by/3.0/). For more information see: Degtyarenko et al. (2008) ChEBI: a database and ontology for chemical entities of biological interest. Nucleic Acids Res. 36, D344–D350.
Term:oxopurine
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Accession:CHEBI:25810 term browser browse the term
Synonyms:related_synonym: oxopurines


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    Term Annotations click to browse term
      CHEBI ontology 19811
        chemical entity 19840
          atom 19809
            nonmetal atom 19747
              nitrogen atom 18962
                nitrogen molecular entity 18934
                  organonitrogen compound 18783
                    organonitrogen heterocyclic compound 18154
                      imidazopyrimidine 7711
                        purines 7710
                          oxopurine 6335
                            1',3'-dimethylspiro[1H-indole-3,8'-7,9-dihydropurine]-2,2',6'-trione 0
                            1,3,7,9-tetramethyluric acid 11
                            1,3,7-trimethyl-5-hydroxyisouric acid 0
                            1,3,7-trimethyl-8-(phenylmethyl)purine-2,6-dione 0
                            1,3,7-trimethylisoguanine 0
                            1,3,7-trimethyluric acid 1
                            1,3,9-Trimethyluric acid 0
                            1,3-dibutyl-7-(2-oxopropyl)purine-2,6-dione 0
                            1,3-dimethyl-7-(5-oxohexyl)purine-2,6-dione 0
                            1,3-dimethyl-7-(phenylmethyl)-8-[2-(thiophen-2-ylmethylidene)hydrazinyl]purine-2,6-dione 0
                            1,3-dimethyl-8-(3-methyl-1-piperidinyl)-7-[2-[(5-methyl-1,3,4-thiadiazol-2-yl)thio]ethyl]purine-2,6-dione 0
                            1,3-dimethyl-8-[2-(1-pyrrolidinyl)ethylthio]-6-sulfanylidene-7H-purin-2-one 0
                            1,3-dimethyl-8-[[methyl-(phenylmethyl)amino]methyl]-7-(2-methylpropyl)purine-2,6-dione 0
                            1,3-dimethyl-8-[methyl-(phenylmethyl)amino]-7-[2-(2-pyrimidinylthio)ethyl]purine-2,6-dione 0
                            1,3-dimethyluric acid 0
                            1,7-dimethyluric acid 0
                            1,9-Dimethyluric acid 0
                            1-(3-Carboxypropyl)-3,7-dimethylxanthine 0
                            1-methyl-3-propyl-7H-xanthine 0
                            1-methyluric acid 1
                            2',3'-secoguanosine 0
                            2,8-dioxoadenine 0
                            2-(1,3-dimethyl-2,6-dioxo-7-purinyl)-N'-[2-(2-ethoxyphenoxy)-1-oxoethyl]acetohydrazide 0
                            2-(1,3-dimethyl-2,6-dioxo-7-purinyl)-N-(phenylmethyl)-N-(2-pyridinyl)acetamide 0
                            2-(1,3-dimethyl-2,6-dioxo-7-purinyl)-N-[3-[(4-methoxyphenyl)sulfamoyl]-4-methylphenyl]acetamide 0
                            2-(1,3-dimethyl-2,6-dioxo-7-purinyl)acetic acid 0
                            2-(\{8-[(3R)-3-aminopiperidin-1-yl]-1,3-dimethyl-2,6-dioxo-1,2,3,6-tetrahydro-7H-purin-7-yl\}methyl)benzonitrile 0
                            2-[(1,3-dimethyl-2,6-dioxo-7-propyl-8-purinyl)thio]-N-(4,5,6,7-tetrahydro-1,3-benzothiazol-2-yl)acetamide 0
                            2-[(7-ethyl-1,3-dimethyl-2,6-dioxo-8-purinyl)thio]-N-(6-methyl-2-pyridinyl)acetamide 0
                            2-[[3-methyl-7-(3-methylbutyl)-2,6-dioxo-8-purinyl]thio]propanoic acid methyl ester 0
                            2-[[7-(3-chlorobut-2-enyl)-3-methyl-2,6-dioxo-8-purinyl]thio]butanoic acid ethyl ester 0
                            2-dimethylamino-6-hydroxypurine 0
                            2-furancarboxylic acid [4-[[[1,3-dimethyl-2,6-dioxo-7-(phenylmethyl)-8-purinyl]hydrazinylidene]methyl]phenyl] ester 0
                            3,5-dimethyl-4-isoxazolecarboxylic acid (3-butyl-2,6-dioxo-7-propyl-8-purinyl)methyl ester 0
                            3,7-dimethyl-1-(phenylmethyl)-8-[(phenylmethyl)amino]purine-2,6-dione 0
                            3,7-dimethylisoguanine 0
                            3,7-dimethyluric acid 0
                            3,9-Dimethyluric acid 0
                            3-Methyluric acid 0
                            3-butyl-8-(2-fluorophenyl)-7-(phenylmethyl)purine-2,6-dione 0
                            3-isobutyl-1-methylxanthine + 3086
                            3-methyl-7-(2-phenylethyl)-8-(propylamino)purine-2,6-dione 0
                            3-methyl-7-(phenylmethyl)-8-(propan-2-ylthio)purine-2,6-dione 0
                            3-methyl-7-[(4-methylphenyl)methyl]-8-[2-(1-piperidinyl)ethylthio]purine-2,6-dione 0
                            3-methyl-7-pentyl-8-(2-phenylethylthio)purine-2,6-dione 0
                            4-(2,6-dioxo-1-propyl-3,7-dihydropurin-8-yl)benzenesulfonic acid 0
                            4-[(1,3-dimethyl-2,6-dioxo-7H-purin-8-yl)methylamino]benzoic acid 0
                            4-[2-[2-[3-methyl-2,6-dioxo-8-(1-piperidinyl)-7-purinyl]ethylidene]hydrazinyl]benzoic acid 0
                            4-[7-(2-methoxyethyl)-2,6-dioxo-3-(phenylmethyl)-8-purinyl]benzonitrile 0
                            4-[[7-[(4-fluorophenyl)methyl]-1,3-dimethyl-2,6-dioxo-8-purinyl]methyl]-1-piperazinecarboxylic acid ethyl ester 0
                            5-hydroxyisouric acid + 0
                            5-hydroxyisouric acid anion 0
                            6,8-Dihydroxypurine 0
                            6-(9'-Purine-6',8'-diolyl)-2beta-suberosanone 0
                            6-Thiourate 1
                            7,8-dihydro-8-oxoguanine + 4
                            7,9-Dimethyluric acid 0
                            7-(2-chloroethyl)-1,3-dimethylpurine-2,6-dione 0
                            7-(2-ethoxyethyl)-3-methyl-8-(1-pyrrolidinyl)purine-2,6-dione 0
                            7-(2-hydroxyethyl)-1,3-dimethylpurine-2,6-dione 0
                            7-(2-methoxyethyl)-3-methyl-8-(phenylthio)purine-2,6-dione 0
                            7-(3-chlorobut-2-enyl)-1,3-dimethyl-8-(2-phenylethylamino)purine-2,6-dione 0
                            7-(3-methoxypropyl)-3-(phenylmethyl)-8-(3-thiophenyl)purine-2,6-dione 0
                            7-Ethylguanine 0
                            7-Methyluric acid 0
                            7-[(2-chloro-6-fluorophenyl)methyl]-1,3-dimethyl-8-(1-piperidinylmethyl)purine-2,6-dione 0
                            7-[(2-chloro-6-fluorophenyl)methyl]-1,3-dimethyl-8-[(3-methyl-1-piperidinyl)methyl]purine-2,6-dione 0
                            7-[(3-bromophenyl)methyl]-1,3-dimethyl-8-(2-methylpropylamino)purine-2,6-dione 0
                            7-[(3-bromophenyl)methyl]-1,3-dimethyl-8-(3-pyridinylmethylamino)purine-2,6-dione 0
                            7-[(4-fluorophenyl)methyl]-1,3-dimethyl-8-[(2-oxo-2-thiophen-2-ylethyl)thio]purine-2,6-dione 0
                            7-[2-(1,3-benzothiazol-2-ylthio)ethyl]-1,3-dimethyl-8-(3-methyl-1-piperidinyl)purine-2,6-dione 0
                            7-[2-hydroxy-3-(2-methylphenoxy)propyl]-3-methyl-8-(propan-2-ylthio)purine-2,6-dione 0
                            7-[2-hydroxy-3-(4-methoxyphenoxy)propyl]-1,3-dimethyl-8-(1-piperidinyl)purine-2,6-dione 0
                            7-[2-hydroxy-3-[2-hydroxyethyl(methyl)amino]propyl]-1,3-dimethylpurine-2,6-dione 0
                            7-\{2-hydroxy-3-[(naphthalen-1-yl)oxy]propyl\}-3-methyl-8-(morpholin-4-yl)-3,7-dihydropurine-2,6-dione 0
                            7-benzyl-1,3-dimethyl-8-piperazin-1-yl-3,7-dihydropurine-2,6-dione 0
                            7-but-2-enyl-3-methyl-8-(3-phenylpropylthio)purine-2,6-dione 0
                            7-but-2-enyl-3-methyl-8-(phenylmethylthio)purine-2,6-dione 0
                            7-hydroxyguanine 0
                            7-methylxanthine 0
                            8-(1,3-benzothiazol-2-ylthio)-3-methyl-7-pentylpurine-2,6-dione 0
                            8-(2,5-dimethylphenoxy)-1,3-dimethyl-7-prop-2-enylpurine-2,6-dione 0
                            8-(3-ethoxypropylamino)-1,3-dimethyl-7H-purine-2,6-dione 0
                            8-(4-methoxyphenyl)-7-methyl-3-(phenylmethyl)purine-2,6-dione 0
                            8-(butan-2-ylthio)-7-[(4-chlorophenyl)methyl]-3-methylpurine-2,6-dione 0
                            8-(methoxymethyl)-1-methyl-3-(2-methylpropyl)-7H-purine-2,6-dione 0
                            8-Chloroxanthine 0
                            8-Hydroxypurine 0
                            8-Hydroxythioguanine 0
                            8-Nitroguanine 0
                            8-[(1-ethyl-3-piperidinyl)thio]-1,3-dimethyl-6-sulfanylidene-7H-purin-2-one 0
                            8-[(2-fluoroanilino)hydrazinylidene]-1,3-dimethylpurine-2,6-dione 0
                            8-[2-(2-bromo-3-phenylprop-2-enylidene)hydrazinyl]-7-(2-hydroxyethyl)-3-methylpurine-2,6-dione 0
                            8-[[4-[2-furanyl(oxo)methyl]-1-piperazinyl]methyl]-1,3-dimethyl-7-[(2-methylphenyl)methyl]purine-2,6-dione 0
                            8-[[4-[2-furanyl(oxo)methyl]-1-piperazinyl]methyl]-1,3-dimethyl-7-propylpurine-2,6-dione 0
                            8-anilino-1,3-dimethyl-7H-purine-2,6-dione 0
                            8-cyclopentyl-1,3-dimethyl-7H-purine-2,6-dione 0
                            8-hydroxy-7-methylguanine 0
                            8-methylcaffeine 0
                            8-oxo-fusatin 0
                            8-oxoadenine 0
                            8-oxoguanine 0
                            8-phenyl-1,3-dipropyl-7H-purine-2,6-dione 0
                            9-Carboxymethoxymethylguanine 0
                            9-Methyluric acid 0
                            9-Methylxanthine 0
                            Acremolin C 0
                            CD 1790 0
                            DPCPX 9
                            Dimethyluric acid 0
                            Furafylline 9
                            LSM-1748 0
                            Migrenin (TN) 0
                            N-(4-cyanophenyl)-2-[4-(2,6-dioxo-1,3-dipropyl-7H-purin-8-yl)phenoxy]acetamide 0
                            O6-CYCLOHEXYLMETHOXY-2-(4'-SULPHAMOYLANILINO) PURINE 0
                            Pentoxifylline 82
                            Propentofylline 0
                            Proxyphylline 0
                            Pyrimido[1,2-a]purin-10(1H)-one 0
                            Rolofylline 0
                            Tetrahydroindol 5 0
                            Theobromine-d6 0
                            Theophylline sodium acetate 0
                            Thioxanthine monophosphate 0
                            Tonapofylline 0
                            acyclovir 18
                            bamifylline 0
                            beta-D-3-Ribofuranosyluric acid 0
                            cafaminol 0
                            cafedrine 0
                            caffeine-(trimethyl-(13)C3) 0
                            caffeine-d9 0
                            cipamfylline 0
                            ddhGMP 0
                            ddhGTP 0
                            dimethazan 0
                            doxofylline 0
                            dyphylline + 0
                            enprofylline + 0
                            entecavir (anhydrous) + 0
                            etamiphylline 0
                            etofylline clofibrate 0
                            etofylline nicotinate 0
                            fenetylline 0
                            ganciclovir + 4
                            guanine + 6269
                            hypoxanthine + 23
                            hypoxanthine 3-N-oxide + 0
                            isoguanine 0
                            istradefylline 4
                            methylguanine + 16
                            methylhypoxanthine + 0
                            pentifylline 0
                            phentetramine 0
                            pimefylline 0
                            protheobromine 0
                            reproterol 1
                            theodrenaline 0
                            urate(2-) + 0
                            uric acid + 129
                            xanthine + 6192
    Path 2
    Term Annotations click to browse term
      CHEBI ontology 19811
        subatomic particle 19809
          composite particle 19809
            hadron 19840
              baryon 19809
                nucleon 19809
                  atomic nucleus 19809
                    atom 19809
                      main group element atom 19759
                        p-block element atom 19759
                          carbon group element atom 19708
                            carbon atom 19734
                              organic molecular entity 19705
                                organic molecule 19658
                                  organic cyclic compound 19471
                                    organic heterocyclic compound 18862
                                      organic heteropolycyclic compound 18301
                                        organic heterobicyclic compound 17233
                                          imidazopyrimidine 7711
                                            purines 7710
                                              oxopurine 6335
                                                1',3'-dimethylspiro[1H-indole-3,8'-7,9-dihydropurine]-2,2',6'-trione 0
                                                1,3,7,9-tetramethyluric acid 11
                                                1,3,7-trimethyl-5-hydroxyisouric acid 0
                                                1,3,7-trimethyl-8-(phenylmethyl)purine-2,6-dione 0
                                                1,3,7-trimethylisoguanine 0
                                                1,3,7-trimethyluric acid 1
                                                1,3,9-Trimethyluric acid 0
                                                1,3-dibutyl-7-(2-oxopropyl)purine-2,6-dione 0
                                                1,3-dimethyl-7-(5-oxohexyl)purine-2,6-dione 0
                                                1,3-dimethyl-7-(phenylmethyl)-8-[2-(thiophen-2-ylmethylidene)hydrazinyl]purine-2,6-dione 0
                                                1,3-dimethyl-8-(3-methyl-1-piperidinyl)-7-[2-[(5-methyl-1,3,4-thiadiazol-2-yl)thio]ethyl]purine-2,6-dione 0
                                                1,3-dimethyl-8-[2-(1-pyrrolidinyl)ethylthio]-6-sulfanylidene-7H-purin-2-one 0
                                                1,3-dimethyl-8-[[methyl-(phenylmethyl)amino]methyl]-7-(2-methylpropyl)purine-2,6-dione 0
                                                1,3-dimethyl-8-[methyl-(phenylmethyl)amino]-7-[2-(2-pyrimidinylthio)ethyl]purine-2,6-dione 0
                                                1,3-dimethyluric acid 0
                                                1,7-dimethyluric acid 0
                                                1,9-Dimethyluric acid 0
                                                1-(3-Carboxypropyl)-3,7-dimethylxanthine 0
                                                1-methyl-3-propyl-7H-xanthine 0
                                                1-methyluric acid 1
                                                2',3'-secoguanosine 0
                                                2,8-dioxoadenine 0
                                                2-(1,3-dimethyl-2,6-dioxo-7-purinyl)-N'-[2-(2-ethoxyphenoxy)-1-oxoethyl]acetohydrazide 0
                                                2-(1,3-dimethyl-2,6-dioxo-7-purinyl)-N-(phenylmethyl)-N-(2-pyridinyl)acetamide 0
                                                2-(1,3-dimethyl-2,6-dioxo-7-purinyl)-N-[3-[(4-methoxyphenyl)sulfamoyl]-4-methylphenyl]acetamide 0
                                                2-(1,3-dimethyl-2,6-dioxo-7-purinyl)acetic acid 0
                                                2-(\{8-[(3R)-3-aminopiperidin-1-yl]-1,3-dimethyl-2,6-dioxo-1,2,3,6-tetrahydro-7H-purin-7-yl\}methyl)benzonitrile 0
                                                2-[(1,3-dimethyl-2,6-dioxo-7-propyl-8-purinyl)thio]-N-(4,5,6,7-tetrahydro-1,3-benzothiazol-2-yl)acetamide 0
                                                2-[(7-ethyl-1,3-dimethyl-2,6-dioxo-8-purinyl)thio]-N-(6-methyl-2-pyridinyl)acetamide 0
                                                2-[[3-methyl-7-(3-methylbutyl)-2,6-dioxo-8-purinyl]thio]propanoic acid methyl ester 0
                                                2-[[7-(3-chlorobut-2-enyl)-3-methyl-2,6-dioxo-8-purinyl]thio]butanoic acid ethyl ester 0
                                                2-dimethylamino-6-hydroxypurine 0
                                                2-furancarboxylic acid [4-[[[1,3-dimethyl-2,6-dioxo-7-(phenylmethyl)-8-purinyl]hydrazinylidene]methyl]phenyl] ester 0
                                                3,5-dimethyl-4-isoxazolecarboxylic acid (3-butyl-2,6-dioxo-7-propyl-8-purinyl)methyl ester 0
                                                3,7-dimethyl-1-(phenylmethyl)-8-[(phenylmethyl)amino]purine-2,6-dione 0
                                                3,7-dimethylisoguanine 0
                                                3,7-dimethyluric acid 0
                                                3,9-Dimethyluric acid 0
                                                3-Methyluric acid 0
                                                3-butyl-8-(2-fluorophenyl)-7-(phenylmethyl)purine-2,6-dione 0
                                                3-isobutyl-1-methylxanthine + 3086
                                                3-methyl-7-(2-phenylethyl)-8-(propylamino)purine-2,6-dione 0
                                                3-methyl-7-(phenylmethyl)-8-(propan-2-ylthio)purine-2,6-dione 0
                                                3-methyl-7-[(4-methylphenyl)methyl]-8-[2-(1-piperidinyl)ethylthio]purine-2,6-dione 0
                                                3-methyl-7-pentyl-8-(2-phenylethylthio)purine-2,6-dione 0
                                                4-(2,6-dioxo-1-propyl-3,7-dihydropurin-8-yl)benzenesulfonic acid 0
                                                4-[(1,3-dimethyl-2,6-dioxo-7H-purin-8-yl)methylamino]benzoic acid 0
                                                4-[2-[2-[3-methyl-2,6-dioxo-8-(1-piperidinyl)-7-purinyl]ethylidene]hydrazinyl]benzoic acid 0
                                                4-[7-(2-methoxyethyl)-2,6-dioxo-3-(phenylmethyl)-8-purinyl]benzonitrile 0
                                                4-[[7-[(4-fluorophenyl)methyl]-1,3-dimethyl-2,6-dioxo-8-purinyl]methyl]-1-piperazinecarboxylic acid ethyl ester 0
                                                5-hydroxyisouric acid + 0
                                                5-hydroxyisouric acid anion 0
                                                6,8-Dihydroxypurine 0
                                                6-(9'-Purine-6',8'-diolyl)-2beta-suberosanone 0
                                                6-Thiourate 1
                                                7,8-dihydro-8-oxoguanine + 4
                                                7,9-Dimethyluric acid 0
                                                7-(2-chloroethyl)-1,3-dimethylpurine-2,6-dione 0
                                                7-(2-ethoxyethyl)-3-methyl-8-(1-pyrrolidinyl)purine-2,6-dione 0
                                                7-(2-hydroxyethyl)-1,3-dimethylpurine-2,6-dione 0
                                                7-(2-methoxyethyl)-3-methyl-8-(phenylthio)purine-2,6-dione 0
                                                7-(3-chlorobut-2-enyl)-1,3-dimethyl-8-(2-phenylethylamino)purine-2,6-dione 0
                                                7-(3-methoxypropyl)-3-(phenylmethyl)-8-(3-thiophenyl)purine-2,6-dione 0
                                                7-Ethylguanine 0
                                                7-Methyluric acid 0
                                                7-[(2-chloro-6-fluorophenyl)methyl]-1,3-dimethyl-8-(1-piperidinylmethyl)purine-2,6-dione 0
                                                7-[(2-chloro-6-fluorophenyl)methyl]-1,3-dimethyl-8-[(3-methyl-1-piperidinyl)methyl]purine-2,6-dione 0
                                                7-[(3-bromophenyl)methyl]-1,3-dimethyl-8-(2-methylpropylamino)purine-2,6-dione 0
                                                7-[(3-bromophenyl)methyl]-1,3-dimethyl-8-(3-pyridinylmethylamino)purine-2,6-dione 0
                                                7-[(4-fluorophenyl)methyl]-1,3-dimethyl-8-[(2-oxo-2-thiophen-2-ylethyl)thio]purine-2,6-dione 0
                                                7-[2-(1,3-benzothiazol-2-ylthio)ethyl]-1,3-dimethyl-8-(3-methyl-1-piperidinyl)purine-2,6-dione 0
                                                7-[2-hydroxy-3-(2-methylphenoxy)propyl]-3-methyl-8-(propan-2-ylthio)purine-2,6-dione 0
                                                7-[2-hydroxy-3-(4-methoxyphenoxy)propyl]-1,3-dimethyl-8-(1-piperidinyl)purine-2,6-dione 0
                                                7-[2-hydroxy-3-[2-hydroxyethyl(methyl)amino]propyl]-1,3-dimethylpurine-2,6-dione 0
                                                7-\{2-hydroxy-3-[(naphthalen-1-yl)oxy]propyl\}-3-methyl-8-(morpholin-4-yl)-3,7-dihydropurine-2,6-dione 0
                                                7-benzyl-1,3-dimethyl-8-piperazin-1-yl-3,7-dihydropurine-2,6-dione 0
                                                7-but-2-enyl-3-methyl-8-(3-phenylpropylthio)purine-2,6-dione 0
                                                7-but-2-enyl-3-methyl-8-(phenylmethylthio)purine-2,6-dione 0
                                                7-hydroxyguanine 0
                                                7-methylxanthine 0
                                                8-(1,3-benzothiazol-2-ylthio)-3-methyl-7-pentylpurine-2,6-dione 0
                                                8-(2,5-dimethylphenoxy)-1,3-dimethyl-7-prop-2-enylpurine-2,6-dione 0
                                                8-(3-ethoxypropylamino)-1,3-dimethyl-7H-purine-2,6-dione 0
                                                8-(4-methoxyphenyl)-7-methyl-3-(phenylmethyl)purine-2,6-dione 0
                                                8-(butan-2-ylthio)-7-[(4-chlorophenyl)methyl]-3-methylpurine-2,6-dione 0
                                                8-(methoxymethyl)-1-methyl-3-(2-methylpropyl)-7H-purine-2,6-dione 0
                                                8-Chloroxanthine 0
                                                8-Hydroxypurine 0
                                                8-Hydroxythioguanine 0
                                                8-Nitroguanine 0
                                                8-[(1-ethyl-3-piperidinyl)thio]-1,3-dimethyl-6-sulfanylidene-7H-purin-2-one 0
                                                8-[(2-fluoroanilino)hydrazinylidene]-1,3-dimethylpurine-2,6-dione 0
                                                8-[2-(2-bromo-3-phenylprop-2-enylidene)hydrazinyl]-7-(2-hydroxyethyl)-3-methylpurine-2,6-dione 0
                                                8-[[4-[2-furanyl(oxo)methyl]-1-piperazinyl]methyl]-1,3-dimethyl-7-[(2-methylphenyl)methyl]purine-2,6-dione 0
                                                8-[[4-[2-furanyl(oxo)methyl]-1-piperazinyl]methyl]-1,3-dimethyl-7-propylpurine-2,6-dione 0
                                                8-anilino-1,3-dimethyl-7H-purine-2,6-dione 0
                                                8-cyclopentyl-1,3-dimethyl-7H-purine-2,6-dione 0
                                                8-hydroxy-7-methylguanine 0
                                                8-methylcaffeine 0
                                                8-oxo-fusatin 0
                                                8-oxoadenine 0
                                                8-oxoguanine 0
                                                8-phenyl-1,3-dipropyl-7H-purine-2,6-dione 0
                                                9-Carboxymethoxymethylguanine 0
                                                9-Methyluric acid 0
                                                9-Methylxanthine 0
                                                Acremolin C 0
                                                CD 1790 0
                                                DPCPX 9
                                                Dimethyluric acid 0
                                                Furafylline 9
                                                LSM-1748 0
                                                Migrenin (TN) 0
                                                N-(4-cyanophenyl)-2-[4-(2,6-dioxo-1,3-dipropyl-7H-purin-8-yl)phenoxy]acetamide 0
                                                O6-CYCLOHEXYLMETHOXY-2-(4'-SULPHAMOYLANILINO) PURINE 0
                                                Pentoxifylline 82
                                                Propentofylline 0
                                                Proxyphylline 0
                                                Pyrimido[1,2-a]purin-10(1H)-one 0
                                                Rolofylline 0
                                                Tetrahydroindol 5 0
                                                Theobromine-d6 0
                                                Theophylline sodium acetate 0
                                                Thioxanthine monophosphate 0
                                                Tonapofylline 0
                                                acyclovir 18
                                                bamifylline 0
                                                beta-D-3-Ribofuranosyluric acid 0
                                                cafaminol 0
                                                cafedrine 0
                                                caffeine-(trimethyl-(13)C3) 0
                                                caffeine-d9 0
                                                cipamfylline 0
                                                ddhGMP 0
                                                ddhGTP 0
                                                dimethazan 0
                                                doxofylline 0
                                                dyphylline + 0
                                                enprofylline + 0
                                                entecavir (anhydrous) + 0
                                                etamiphylline 0
                                                etofylline clofibrate 0
                                                etofylline nicotinate 0
                                                fenetylline 0
                                                ganciclovir + 4
                                                guanine + 6269
                                                hypoxanthine + 23
                                                hypoxanthine 3-N-oxide + 0
                                                isoguanine 0
                                                istradefylline 4
                                                methylguanine + 16
                                                methylhypoxanthine + 0
                                                pentifylline 0
                                                phentetramine 0
                                                pimefylline 0
                                                protheobromine 0
                                                reproterol 1
                                                theodrenaline 0
                                                urate(2-) + 0
                                                uric acid + 129
                                                xanthine + 6192
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