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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:76133 term browser browse the term
Definition:An organic heterotricyclic compound that is 2H,5H-[1,3]oxazino[5,6-c][1,2]benzothiazine-2,4(3H)-dione 6,6-dioxide substituted at positions 3 and 5 by pyridin-2-yl and methyl groups respectively. A prodrug of piroxicam, it is used for the relief of pain and inflammation in musculoskeletal disorders such as rheumatoid arthritis and osteoarthritis.
Synonyms:exact_synonym: 5-methyl-3-(pyridin-2-yl)-2H,5H-[1,3]oxazino[5,6-c][1,2]benzothiazine-2,4(3H)-dione 6,6-dioxide
 related_synonym: Formula=C16H11N3O5S;   InChI=1S/C16H11N3O5S/c1-18-13-14(10-6-2-3-7-11(10)25(18,22)23)24-16(21)19(15(13)20)12-8-4-5-9-17-12/h2-9H,1H3;   InChIKey=OEHFRZLKGRKFAS-UHFFFAOYSA-N;   SMILES=CN1c2c(oc(=O)n(-c3ccccn3)c2=O)-c2ccccc2S1(=O)=O;   droxicamum
 xref: CAS:90101-16-9;   Drug_Central:970;   KEGG:D07267;   PMID:12093490;   PMID:1365484;   PMID:1365486;   PMID:1365487;   PMID:1365489;   PMID:1365490;   PMID:1365491;   PMID:1487550;   PMID:1507922;   PMID:1507923;   PMID:1507924;   PMID:1545609;   PMID:23656309;   PMID:2778095;   PMID:3110512;   PMID:3221746;   PMID:3278945;   PMID:3489870;   PMID:3762266;   PMID:8489815;   PMID:8492964;   PMID:8616003;   PMID:8656732;   PMID:8983932;   Patent:US4563452;   Patent:US4797482;   Reaxys:6006252;   Wikipedia:Droxicam

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  CHEBI ontology 19781
    role 19726
      application 19412
        pro-agent 8890
          prodrug 8645
            droxicam 0
Path 2
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  CHEBI ontology 19781
    subatomic particle 19779
      composite particle 19779
        hadron 19779
          baryon 19779
            nucleon 19779
              atomic nucleus 19779
                atom 19779
                  main group element atom 19669
                    p-block element atom 19669
                      carbon group element atom 19588
                        carbon atom 19578
                          organic molecular entity 19578
                            organic group 18620
                              organic divalent group 18611
                                organodiyl group 18611
                                  carbonyl group 18526
                                    carbonyl compound 18526
                                      carboxylic acid 18202
                                        carboacyl group 17418
                                          univalent carboacyl group 17418
                                            carbamoyl group 17216
                                              carboxamide 17216
                                                monocarboxylic acid amide 14629
                                                  piroxicam 586
                                                    droxicam 0
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