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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:140276 term browser browse the term
Definition:A member of the class of rifamycins that is rifamycin itself in which the hydroxy hydrogen at position 21 has been replaced by a phosphono group.
Synonyms:exact_synonym: (2S,12Z,14E,16S,17S,18S,19S,20R,21S,22R,23S,24E)-5,6,9,19-tetrahydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-8-{(E)-[(4-methylpiperazin-1-yl)imino]methyl}-1,11-dioxo-17-(phosphonooxy)-1,2-dihydro-2,7-(epoxypentadeca[1,11,13]trienoimino)naphtho[2,1-b]furan-21-yl acetate
 related_synonym: Formula=C43H59N4O15P;   InChI=1S/C43H59N4O15P/c1-21-12-11-13-22(2)42(54)45-33-28(20-44-47-17-15-46(9)16-18-47)36(51)30-31(37(33)52)35(50)26(6)40-32(30)41(53)43(8,61-40)59-19-14-29(58-10)23(3)39(60-27(7)48)25(5)34(49)24(4)38(21)62-63(55,56)57/h11-14,19-21,23-25,29,34,38-39,49-52H,15-18H2,1-10H3,(H,45,54)(H2,55,56,57)/b12-11+,19-14+,22-13-,44-20+/t21-,23+,24-,25+,29-,34+,38-,39+,43-/m0/s1;   InChIKey=DLPFYGTUMXCNLJ-WSSVZIAPSA-N;   SMILES=C1=2C(=C(C=3O[C@]4(C(C3C1=C(C(=C(C2O)NC(C(=CC=C[C@@H]([C@@H]([C@H]([C@H]([C@H]([C@@H]([C@@H]([C@H](C=CO4)OC)C)OC(C)=O)C)O)C)OP(=O)(O)O)C)C)=O)/C=N/N5CCN(CC5)C)O)=O)C)C)O
 xref: MetaCyc:CPD-20026;   PMID:24778229;   PMID:27103605
 cyclic_relationship: is_conjugate_acid_of CHEBI:140195

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Path 1
Term Annotations click to browse term
  CHEBI ontology 19810
    role 19758
      application 19420
        pharmaceutical 19293
          drug 19293
            antineoplastic agent 17004
              rifampicin 376
                21-phosphorifampicin 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19810
    subatomic particle 19808
      composite particle 19808
        hadron 19808
          baryon 19808
            nucleon 19808
              atomic nucleus 19808
                atom 19808
                  main group element atom 19696
                    p-block element atom 19696
                      carbon group element atom 19599
                        carbon atom 19588
                          organic molecular entity 19588
                            organic group 18527
                              organic divalent group 18520
                                organodiyl group 18520
                                  carbonyl group 18427
                                    carbonyl compound 18427
                                      carboxylic acid 18108
                                        carboacyl group 17369
                                          univalent carboacyl group 17369
                                            carbamoyl group 17156
                                              carboxamide 17156
                                                lactam 8032
                                                  ansamycin 835
                                                    rifamycins 390
                                                      rifampicin 376
                                                        21-phosphorifampicin 0
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