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The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at The data is made available under the Creative Commons License (CC 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.

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Accession:CHEBI:27732 term browser browse the term
Definition:A trimethylxanthine in which the three methyl groups are located at positions 1, 3, and 7. A purine alkaloid that occurs naturally in tea and coffee.
Synonyms:related_synonym: 1,3,7-trimethyl-2,6-dioxopurine;   1,3,7-trimethylpurine-2,6-dione;   1,3,7-trimethylxanthine;   1-methyltheobromine;   3,7-Dihydro-1,3,7-trimethyl-1H-purin-2,6-dion;   3,7-Dihydro-1,3,7-trimethyl-1H-purine-2,6-dione;   7-methyltheophylline;   Coffein;   Formula=C8H10N4O2;   InChI=1S/C8H10N4O2/c1-10-4-9-6-5(10)7(13)12(3)8(14)11(6)2/h4H,1-3H3;   InChIKey=RYYVLZVUVIJVGH-UHFFFAOYSA-N;   Koffein;   SMILES=Cn1cnc2n(C)c(=O)n(C)c(=O)c12;   Thein;   anhydrous caffeine;   cafeina;   cafeine;   guaranine;   mateina;   methyltheobromine;   teina;   theine
 alt_id: CHEBI:22982;   CHEBI:3295;   CHEBI:41472
 xref: Beilstein:17705;   CAS:58-08-2;   DrugBank:DB00201;   Drug_Central:463;   Gmelin:103040;   HMDB:HMDB0001847;   KEGG:C07481;   KEGG:D00528;   KNApSAcK:C00001492;   LINCS:LSM-2026
 xref_mesh: MESH:D002110
 xref: MetaCyc:1-3-7-TRIMETHYLXANTHINE;   PDBeChem:CFF;   PMID:10510174;   PMID:10796597;   PMID:10803761;   PMID:10822912;   PMID:10884512;   PMID:10924888;   PMID:10983026;   PMID:11014293;   PMID:11022879;   PMID:11209966;   PMID:11312039;   PMID:11410911;   PMID:11431501;   PMID:11815511;   PMID:11949272;   PMID:12397877;   PMID:12457274;   PMID:12574990;   PMID:12915014;   PMID:12943586;   PMID:14521986;   PMID:14607010;   PMID:15257305;   PMID:15280431;   PMID:15681408;   PMID:15718055;   PMID:15840517;   PMID:16143823;   PMID:16391865;   PMID:16528931;   PMID:16644114;   PMID:16709440;   PMID:16805851;   PMID:16856769;   PMID:17132260;   PMID:17387608;   PMID:17508167;   PMID:17724925;   PMID:17932622;   PMID:17957400;   PMID:18068204;   PMID:18258404;   PMID:18421070;   PMID:18513215;   PMID:18625110;   PMID:18647558;   PMID:19007524;   PMID:19047957;   PMID:19084078;   PMID:19088793;   PMID:19418355;   PMID:19879252;   PMID:20164568;   PMID:20470411;   PMID:22114686;   PMID:22770225;   PMID:23551936;   PMID:24039592;   PMID:7441110;   PMID:7689104;   PMID:8332255;   PMID:8347173;   PMID:8679661;   PMID:9063686;   PMID:9067318;   PMID:9132918;   PMID:9218278;   Reaxys:17705;   Wikipedia:Caffeine

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      CHEBI ontology 19908
        role 19883
          biological role 19881
            xenobiotic 18772
              caffeine 3731
                8-(3-chlorostyryl)caffeine 5
                caffeine monohydrate 0
                sodium caffeine benzoate 0
    Path 2
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      CHEBI ontology 19908
        subatomic particle 19906
          composite particle 19906
            hadron 19906
              baryon 19906
                nucleon 19906
                  atomic nucleus 19906
                    atom 19906
                      main group element atom 19853
                        p-block element atom 19853
                          carbon group element atom 19799
                            carbon atom 19794
                              organic molecular entity 19794
                                organic molecule 19751
                                  organic cyclic compound 19559
                                    organic heterocyclic compound 18896
                                      organic heteropolycyclic compound 18317
                                        organic heterobicyclic compound 17269
                                          imidazopyrimidine 7685
                                            purines 7684
                                              aminopurine 6656
                                                2-aminopurines 6303
                                                  guanine 6276
                                                    xanthine 6198
                                                      methylxanthine 4086
                                                        trimethylxanthine 3731
                                                          caffeine 3731
                                                            8-(3-chlorostyryl)caffeine 5
                                                            caffeine monohydrate 0
                                                            sodium caffeine benzoate 0
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