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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:6701 term browser browse the term
Definition:An organic heterotetracyclic compound and 19-membered macrocyclic lactam antibiotic originally isolated from the Ethiopian shrub Maytenus serrata but also found in other Maytenus species. It exhibits cytotoxicity against many tumour cell lines.
Synonyms:exact_synonym: (4beta,5beta,11E,13E)-maytansine
 related_synonym: Formula=C34H46ClN3O10;   InChI=1S/C34H46ClN3O10/c1-18-11-10-12-26(45-9)34(43)17-25(46-32(42)36-34)19(2)30-33(5,48-30)27(47-31(41)20(3)37(6)21(4)39)16-28(40)38(7)23-14-22(13-18)15-24(44-8)29(23)35/h10-12,14-15,19-20,25-27,30,43H,13,16-17H2,1-9H3,(H,36,42)/b12-10+,18-11+/t19-,20+,25+,26-,27+,30+,33+,34+/m1/s1;   InChIKey=WKPWGQKGSOKKOO-RSFHAFMBSA-N;   NSC 153858;   SMILES=CO[C@@H]1\\C=C\\C=C(C)\\Cc2cc(OC)c(Cl)c(c2)N(C)C(=O)C[C@H](OC(=O)[C@H](C)N(C)C(C)=O)[C@]2(C)O[C@H]2[C@H](C)[C@@H]2C[C@@]1(O)NC(=O)O2;   maitansina;   maitansine;   maitansinum
 xref: CAS:35846-53-8;   KEGG:C10606;   KEGG:D04864;   KNApSAcK:C00002351;   LIPID_MAPS_instance:LMPK04000017;   PMID:1241159;   PMID:20937594;   PMID:367597;   PMID:3834790;   PMID:628025;   Reaxys:5417399;   Wikipedia:Maytansine

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Path 1
Term Annotations click to browse term
  CHEBI ontology 20089
    role 20042
      biological role 20011
        antimicrobial agent 17818
          maytansine 0
            mertansine 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 20089
    subatomic particle 20058
      composite particle 20058
        hadron 20088
          baryon 20088
            nucleon 20088
              atomic nucleus 20088
                atom 20058
                  main group element atom 19960
                    p-block element atom 19990
                      carbon group element atom 19916
                        carbon atom 19909
                          organic molecular entity 19909
                            organic group 18988
                              organic divalent group 18950
                                organodiyl group 18974
                                  carbonyl group 18903
                                    carbonyl compound 18925
                                      carboxylic acid 18597
                                        carboacyl group 17730
                                          univalent carboacyl group 17710
                                            carbamoyl group 17550
                                              carboxamide 17570
                                                lactam 8349
                                                  maytansinoid 0
                                                    maytansine 0
                                                      mertansine 0
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