tetracyclic steroid nucleus

(redirected from steroid nucleus)

tet·ra·cy·clic ster·oid nu·cle·us

the group of four fused rings forming the framework or parent substance of the steroids.
Synonym(s): perhydrocyclopenta [a]phenanthrene, steroid nucleus
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Loci where modifications occur as well as examples of typical reactions, resulting in structural modifications to the steroid nucleus, are also shown.