(8S,11R,13S,14S,17S)-17-hydroxy-11-[4-((RS)-1-hydroxyethyl)phenyl]-13-methyl-17-pentafluoroethyl-1,2,6,7,8,11,12,13,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-3-one 、
BOC-D-丙氨酸 以324 mg (81%) of the title compounds were isolated as a colourless foam的产率得到(R)-2-tert-butoxycarbonylaminopropionic acid (RS)-1-[4-((8S,11R,13S,14S,17S)-17-hydroxy-13-methyl-3-oxo-17-pentafluoroethyl-2,3,6,7,8,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-11-yl)phenyl]ethyl ester