Canadian Medical Guide > Chemicals and Drugs > Polycyclic Hydrocarbons > Steroids > Norsteroids > Norpregnanes Terms and Definitions

Norpregnanes

Medical Definition:	Pregnanes which have undergone ring contractions or are lacking carbon-18 or carbon-19. Unsaturation in the steroid ring system is not included.
Guide Notes:	do not confuse with NORPREGNENES

Norpregnanes Categories.

	Norpregnadienes - Pregnadienes which have undergone ring contractions or are lacking carbon-18 or carbon-19.
	Norpregnatrienes - Pregnatrienes which have undergone ring contractions or are lacking carbon-18 or carbon-19.
	Norpregnenes - Pregnenes with one double bond or more than three double bonds which have undergone ring contractions or are lacking carbon-18 or carbon-19..

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