(R)-5-((3R,9S,10R,13R,14R,17R)-3-Acetoxy-10,13-dimethyl-4,9,10,11,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-17-yl)-hexanoic acid methyl ester

1α,2α-epoxy-3β-hydroxy-20(R)-(3-methoxycarbonylpropyl)pregna-5,7-diene