上游原料
(1S,2S,3R,4S,7S,8S,10R,13S)-10-(acetoxy)-1,7-bis(benzyloxy)-13-[[tert-butyl(dimethyl)silyl]oxy]-8,12,15,15-tetramethyl-5,9-dioxo-4-[(phenylsulfanyl)methyl]tricyclo[9.3.1.0(3,8)]pentadec-11-en-2-yl benzoate2-Bromoacetyl bromide; Bromoacetyl bromide(8R,9S,13S,14S,17S)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol(8R,9S,13S,14S,17S)-17-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-3-yl benzoate(8R,9S,13S,14S,17S)-17-[(2-bromoacetyl)oxy]-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-3-yl benzoatesilver(1+) 4-[4-[bis(2-chloroethyl)amino]phenyl]butanoate
