The molecule is a withanolide that is (22R)-22,26-epoxyergosta-1,4,24-triene substituted by oxo groups at positions 3 and 26. Isolated from Paraminabea acronocephala, it exhibits antineoplastic and anti-inflammatory activities. It has a role as an anti-inflammatory agent, an antineoplastic agent and a coral metabolite. It is a withanolide, a delta-lactone, an organic heterotetracyclic compound, an ergostanoid and a 3-oxo-Delta(1),Delta(4)-steroid.
(2R)-2-[(1S)-1-[(8S,9S,10R,13S,14S,17R)-10,13-dimethyl-3-oxo-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-17-yl]ethyl]-4,5-dimethyl-2,3-dihydropyran-6-one