(4aS,4bS,5aS,6aS,7S,8S,9aS,9bS)-7-(2-hydroxyacetyl)-4a,6a,8-trimethyl-4,4a,5a,6,6a,7,8,9,9a,9b,10,11-dodecahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-2(3H)-one