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If more than one ring is opened, general systematic nomenclature may be preferable. The principles of Note (a) to Rule 2S-7.1, apply also to seco-steroids.

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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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