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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:137037 term browser browse the term
Definition:An androstanoid that is 5alpha-dihydrotestosterone carrying an additional hydroxy susbstituent at position 18.
Synonyms:related_synonym: (5alpha,17beta)-17,18-dihydroxyandrostan-3-one;   17beta,18-dihydroxy-3-oxo-5alpha-androstanone;   17beta,18-dihydroxy-5alpha-androstan-3-one;   18-hydroxydihydrotestosterone;   Formula=C19H30O3;   InChI=1S/C19H30O3/c1-18-8-6-13(21)10-12(18)2-3-14-15(18)7-9-19(11-20)16(14)4-5-17(19)22/h12,14-17,20,22H,2-11H2,1H3/t12-,14+,15-,16-,17-,18-,19+/m0/s1;   InChIKey=JZIBJMFPRNIDRR-SGDLSELDSA-N;   SMILES=C1[C@@]2([C@]3(CC[C@]4([C@]([C@@]3(CC[C@]2(CC(C1)=O)[H])[H])(CC[C@@H]4O)[H])CO)[H])C
 xref: PMID:22773874;   Reaxys:7352931

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Term Annotations click to browse term
  CHEBI ontology 21475
    role 21452
      biological role 21451
        molecular messenger 18770
          hormone 18218
            sex hormone 18050
              androgen 3950
                17beta-hydroxy-5alpha-androstan-3-one 997
                  18-hydroxy-5alpha-dihydrotestosterone 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 21475
    subatomic particle 21460
      composite particle 21460
        hadron 21460
          baryon 21460
            nucleon 21460
              atomic nucleus 21460
                atom 21460
                  main group element atom 21361
                    p-block element atom 21361
                      carbon group element atom 21148
                        carbon atom 21046
                          organic molecular entity 21046
                            organic group 19485
                              organic divalent group 19475
                                organodiyl group 19475
                                  carbonyl group 19452
                                    carbonyl compound 19452
                                      ketone 16626
                                        oxo steroid 9452
                                          3-oxo steroid 8916
                                            3-oxo-5alpha-steroid 1008
                                              17beta-hydroxy-5alpha-androstan-3-one 997
                                                18-hydroxy-5alpha-dihydrotestosterone 0
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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.