乙酸异丙烯酯 、
11β-acetoxy-16α,17α-dimethyl-5β-pregnane-3,20-dione 3,3-dimethyl acetal 、
碘甲烷 以4%的产率得到Propionic acid (8S,10R,13S,14S,16R,17S)-10,13,16,17-tetramethyl-3-oxo-17-propionyl-8,9,10,11,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-11-yl ester