Formula C21H36 | Molar mass 288.511 g/mol | |
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Pregnane is a C21 steroid and, indirectly, a parent of progesterone. It is a parent hydrocarbon for two series of steroids stemming from 5α-pregnane (originally allopregnane) and 5β-pregnane (17β-ethyletiocholane). It has a gonane core.
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5β-Pregnane is the parent of the progesterones, pregnane alcohols, ketones, and several adrenocortical hormones and is found largely in urine as a metabolic product of 5β-pregnane compounds.
Pregnanes
Pregnanes are steroid derivatives with carbons present at positions 1 through 21.
Most biologically significant pregnane derivatives fall into one of two groups: pregnenes and pregnadienes. Another class is pregnatrienes.
Pregnenes
Pregnenes have a double bond. Examples include:
Pregnadienes
Pregnadienes have two double bonds. Examples include:
References
Pregnane Wikipedia(Text) CC BY-SA