Concept explainers
Interpretation:
The systematic name for the given steroid is to be determined.
Concept introduction:
Steroids are a group of compounds that are obtained from lipids of plants and animals. Chemically, they are the derivatives of perhydrocyclopentanophenanthrene ring system.
Pregnane is a 21-carbon saturated hydrocarbon steroid that is responsible for producing progestins. It is an
Androstan are a group of steroid hormones. The
The numbering of the carbon atoms and naming of the ring system are done as shown in the figure. The A, B ring junction may be cis or trans, but B, C and C, D ring junctions are mostly trans.
The methyl groups attached at the points of the ring junction are called angular methyl groups and they are the reference points for the stereochemical designations.
Conventionally, groups that lie on the top of the molecule, same as that of the angular methyl group, are designated as
The nature of the
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