(8S,10S,13S,14S,16R,17S)-10,13,16-Trimethyl-17-propionyl-6,7,8,10,12,13,14,15,16,17-decahydro-cyclopenta[a]phenanthren-3-one 生成 (8S,9S,10R,11S,13S,14S,16R,17S)-11-Hydroxy-10,13,16-trimethyl-17-propionyl-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-cyclopenta[a]phenanthren-3-one