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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:16673 term browser browse the term
Definition:An analogue of chlorophyll that lacks the phytol side-chain. The parent of the protochlorophyllide class.
Synonyms:exact_synonym: {3-[(21R)-9-ethenyl-14-ethyl-21-(methoxycarbonyl)-4,8,13,18-tetramethyl-20-oxo-3,4-didehydrophorbin-3-yl-kappa(4)N(23),N(24),N(25),N(26)]propanoato(2-)}magnesium
 related_synonym: Formula=C35H32MgN4O5;   InChI=1S/C35H34N4O5.Mg/c1-8-19-15(3)22-12-24-17(5)21(10-11-28(40)41)32(38-24)30-31(35(43)44-7)34(42)29-18(6)25(39-33(29)30)14-27-20(9-2)16(4)23(37-27)13-26(19)36-22;/h8,12-14,31H,1,9-11H2,2-7H3,(H3,36,37,38,39,40,41,42);/q;+2/p-2/b22-12-,23-13-,24-12-,25-14-,26-13-,27-14-,32-30-;/t31-;/m1./s1;   InChIKey=QBPCOMNNISRCTC-KKNVGXODSA-L;   SMILES=CCC1=C(C)C2=[N+]3C1=Cc1c(C)c4C(=O)[C@H](C(=O)OC)C5=C6C(CCC(O)=O)=C(C)C7=[N+]6[Mg--]3(n1c45)n1c(=C7)c(C)c(C=C)c1=C2;   protochlorophyllide a;   {3-[(21R)-14-ethyl-21-(methoxycarbonyl)-4,8,13,18-tetramethyl-20-oxo-9-vinyl-3,4-didehydrophorbin-3-yl-kappa(4)N(23),N(24),N(25),N(26)]propanoato(2-)}magnesium
 alt_id: CHEBI:14956;   CHEBI:26353;   CHEBI:8587
 xref: Beilstein:7511448;   CAS:20369-67-9;   KEGG:C02880;   PDBeChem:PMR;   PMID:16668650;   PMID:21190679;   PMID:21678944;   Reaxys:19512139;   Wikipedia:Protochlorophyllide
 cyclic_relationship: is_conjugate_acid_of CHEBI:57855

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Path 1
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  CHEBI ontology 19853
    role 19804
      biological role 19804
        biophysical role 12649
          biological pigment 1050
            protochlorophyllide 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19853
    subatomic particle 19851
      composite particle 19851
        hadron 19851
          baryon 19851
            nucleon 19851
              atomic nucleus 19851
                atom 19851
                  main group element atom 19744
                    p-block element atom 19744
                      carbon group element atom 19650
                        carbon atom 19639
                          organic molecular entity 19639
                            organic molecule 19568
                              organic cyclic compound 19378
                                organic heterocyclic compound 18495
                                  organonitrogen heterocyclic compound 17564
                                    polypyrrole 612
                                      tetrapyrrole 499
                                        cyclic tetrapyrrole 369
                                          porphyrins 342
                                            metalloporphyrin 311
                                              magnesium porphyrin 0
                                                chlorophyll 0
                                                  chlorophyllide 0
                                                    protochlorophyllides 0
                                                      protochlorophyllide 0
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