ACD/Name

Nomenclature of Steroids

Rule 2S-2 Fundamental Heterocycles

2.1 - The parent tetracyclic hydrocarbon without methyl groups at C-10 and C-13 and without a sidechain at C-17 is named "gonane".

5a-Gonane

5b-Gonane

2.2 - The hydrocarbon with a methyl group at C-13 but without a methyl group at C-10 and without a sidechain at C-17 is named "estrane".

5-Estrane

5-Estrane

Note: Names of compounds having a methyl group attached to C-10 and a hydrogen atom attached to C-13 are to be based on 18-norandrostane (see Rule 2S-6.1)


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This HTML reproduction of Sections A, B and C of IUPAC "Blue Book" is as close as possible to the published version [see Nomenclature of Organic Chemistry, Sections A, B, C, D, E, F, and H, Pergamon Press, Oxford, 1979. Copyright 1979 IUPAC.] If you need to cite these rules please quote this reference as their source.

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