(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 、
N-allyloxycarbonyl-(L)-valine 以495 mg (91%) of the title compounds were isolated as a colourless foam的产率得到(S)-2-allyloxycarbonylamino-3-methylbutyric acid (RS)-1-[4-((8S,11R,13S,14S,17S)-17-hydroxy-1 3-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