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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:49388 term browser browse the term
Definition:A C50 carotenoid that is a red-coloured pigment found in several Halobacterium and Haloarcula species.
Synonyms:related_synonym: (2S,2'S)-2,2'-bis(3-hydroxy-3-methylbutyl)-3,4,3',4'-tetradehydro-1,2,1',2'-tetrahydro-gamma,gamma-carotene-1,1'-diol;   (5S,,6E,8E,10E,12E,14E,16E,18E,20E,22E,24E,26E,28E,30E,32S)-5,32-bis(2-hydroxypropan-2-yl)-2,8,12,16,21,25,29,35-octamethylhexatriaconta-6,8,10,12,14,16,18,20,22,24,26,28,30-tridecaene-2,35-diol;   Formula=C50H76O4;   InChI=1S/C50H76O4/c1-39(23-17-25-41(3)27-19-29-43(5)31-33-45(49(11,12)53)35-37-47(7,8)51)21-15-16-22-40(2)24-18-26-42(4)28-20-30-44(6)32-34-46(50(13,14)54)36-38-48(9,10)52/h15-34,45-46,51-54H,35-38H2,1-14H3/b16-15+,23-17+,24-18+,27-19+,28-20+,33-31+,34-32+,39-21+,40-22+,41-25+,42-26+,43-29+,44-30+/t45-,46-/m1/s1;   InChIKey=UVCQMCCIAHQDAF-RNTVPSGKSA-N;   SMILES=C\\C(\\C=C\\C=C(/C)\\C=C\\C=C(/C)\\C=C\\[C@H](CCC(C)(C)O)C(C)(C)O)=C/C=C/C=C(\\C)/C=C/C=C(\\C)/C=C/C=C(\\C)/C=C/[C@H](CCC(C)(C)O)C(C)(C)O
 xref: CAS:32719-43-0;   MetaCyc:CPD-18004;   PDBeChem:22B;   PMID:23376264;   PMID:24823651;   PMID:25402913;   PMID:25712483;   PMID:25910021;   PMID:25960108;   Reaxys:5915104

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  CHEBI ontology 0
    role 0
      biological role 0
        biophysical role 0
          biological pigment 0
            bacterioruberin 0
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  CHEBI ontology 0
    subatomic particle 0
      composite particle 0
        hadron 0
          baryon 0
            nucleon 0
              atomic nucleus 0
                atom 0
                  main group element atom 0
                    main group molecular entity 0
                      s-block molecular entity 0
                        hydrogen molecular entity 0
                          hydrides 0
                            organic hydride 0
                              organic fundamental parent 0
                                hydrocarbon 0
                                  terpene 0
                                    tetraterpene 0
                                      carotene 0
                                        carotenoid 0
                                          C50 carotenoid 0
                                            bacterioruberin 0
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