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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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Path 1
Term Annotations click to browse term
  CHEBI ontology 19787
    role 19734
      biological role 19734
        molecular messenger 18251
          hormone 18001
            sex hormone 17882
              androgen 3939
                17beta-hydroxy-5alpha-androstan-3-one 981
                  18-hydroxy-5alpha-dihydrotestosterone 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19787
    subatomic particle 19784
      composite particle 19784
        hadron 19784
          baryon 19784
            nucleon 19784
              atomic nucleus 19784
                atom 19784
                  main group element atom 19672
                    p-block element atom 19672
                      carbon group element atom 19574
                        carbon atom 19563
                          organic molecular entity 19563
                            organic group 18495
                              organic divalent group 18488
                                organodiyl group 18488
                                  carbonyl group 18391
                                    carbonyl compound 18391
                                      ketone 16144
                                        oxo steroid 9276
                                          3-oxo steroid 8806
                                            3-oxo-5alpha-steroid 992
                                              17beta-hydroxy-5alpha-androstan-3-one 981
                                                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.