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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:63843 term browser browse the term
Definition:A C21-steroid that is pregnane which contains a double bond between positions 5 and 6 and is substituted by oxo groups at positions 3 and 20 as well as a hydroxy group at position 17.
Synonyms:exact_synonym: 17-hydroxypregn-5-ene-3,20-dione
 related_synonym: 17-Hydroxypregnenedione;   Formula=C21H30O3;   InChI=1S/C21H30O3/c1-13(22)21(24)11-8-18-16-5-4-14-12-15(23)6-9-19(14,2)17(16)7-10-20(18,21)3/h4,16-18,24H,5-12H2,1-3H3/t16-,17+,18+,19+,20+,21+/m1/s1;   InChIKey=RCFJDVCRANOZEL-CEGNMAFCSA-N;   SMILES=[H][C@@]12CC=C3CC(=O)CC[C@]3(C)[C@@]1([H])CC[C@@]1(C)[C@@]2([H])CC[C@]1(O)C(C)=O;   pregn-5-ene-3,20-dione-17-ol
 xref: CAS:641-80-5;   Reaxys:3104241

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Term Annotations click to browse term
  CHEBI ontology 19800
    chemical entity 19800
      atom 19799
        nonmetal atom 19686
          carbon atom 19609
            organic molecular entity 19609
              lipid 17493
                steroid 13347
                  C21-steroid 3926
                    17alpha-hydroxypregn-5-ene-3,20-dione 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19800
    subatomic particle 19799
      composite particle 19799
        hadron 19799
          baryon 19799
            nucleon 19799
              atomic nucleus 19799
                atom 19799
                  main group element atom 19698
                    p-block element atom 19698
                      carbon group element atom 19619
                        carbon atom 19609
                          organic molecular entity 19609
                            organic group 18718
                              organic divalent group 18702
                                organodiyl group 18702
                                  carbonyl group 18651
                                    carbonyl compound 18651
                                      ketone 16957
                                        oxyketone 8674
                                          alpha-oxyketone 8674
                                            alpha-hydroxy ketone 8674
                                              tertiary alpha-hydroxy ketone 8378
                                                17alpha-hydroxypregn-5-ene-3,20-dione 0
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