A
pregnadiene is a
diene derivative of a
pregnane.
Dienes have two . The first is usually between carbon 4 and carbon 5 on ring A.
6-ene
The second can be between carbons 6 and 7 on ring B:
)]]
)]]
(progestin)]]
, appetite stimulant)]]
(aldosterone antagonist)]]
(progestin)]]
1-ene
The second can also be between carbons 1 and 2 on ring A:
