17-carbon compound gonane, a hydrocarbon composed only of the ABCD-ring (without branches or substitution), is the simplest steroid and a substructure present in most steroids.
5α-Cholestane, a 27 carbon steroid hydrocarbon with ABCD-ring system, 2 axial methyl groups attached at C-10 and C-13, and an 8 carbon side chain at C-17—the carbon framework present in cholesterol and many other steroids.
Cholesterol, a prototypical animal sterol, and precursor via steroidogenesis of most other animal…
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