(8S,10S,13S,14S,16R,17S)-17-Isobutyryl-10,13,16,17-tetramethyl-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-17-isobutyryl-10,13,16,17-tetramethyl-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-cyclopenta[a]phenanthren-3-one