| pregnene | An unsaturated steroid of primarily terminological importance; utilised in systematic nomenclature of appropriate 21-carbon steroids. (05 Mar 2000) |
|---|---|
| pregnenediones | Unsaturated pregnane derivatives containing two keto groups on side chains or ring structures. (12 Dec 1998) |
| pregnenes | Unsaturated derivatives of pregnanes. (12 Dec 1998) |
| pregnene |
a term used in steroid hormone nomenclature to refer to an unsaturated 21-carbon structure with one double bond and three methyl groups; the δ4 and δ5 pregnene steroid nucleus forms the basis of most of the biologically active progestins and corticosteroids.
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