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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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  CHEBI ontology 221
    role 221
      biological role 221
        molecular messenger 51
          hormone 31
            sex hormone 15
              androgen 4
                17beta-hydroxy-5alpha-androstan-3-one 1
                  18-hydroxy-5alpha-dihydrotestosterone 0
Path 2
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  CHEBI ontology 221
    subatomic particle 221
      composite particle 221
        hadron 221
          baryon 221
            nucleon 221
              atomic nucleus 221
                atom 221
                  main group element atom 214
                    p-block element atom 214
                      carbon group element atom 203
                        carbon atom 202
                          organic molecular entity 202
                            organic group 151
                              organic divalent group 150
                                organodiyl group 150
                                  carbonyl group 150
                                    carbonyl compound 150
                                      ketone 48
                                        oxo steroid 23
                                          3-oxo steroid 21
                                            3-oxo-5alpha-steroid 1
                                              17beta-hydroxy-5alpha-androstan-3-one 1
                                                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.