The molecule is an epoxy steroid that is pregn-4-ene-3,20-dione which has an epoxy group whose oxygen is attached to the 9alpha and 11alpha-positions. It is a 20-oxo steroid, a C21-steroid, a 3-oxo-Delta(4) steroid and an epoxy steroid. It derives from a hydride of a pregnane.
(1R,2S,10S,11S,14S,15S,17R)-14-acetyl-2,15-dimethyl-18-oxapentacyclo[8.8.0.01,17.02,7.011,15]octadec-6-en-5-one