上游原料
Methyl (triphenylphosphoranylidene)acetate; (methoxycarbonylmethylene)triphenylphosphorane；Methyl 2-(triphenyl-lambda(5)-phosphanylidene)acetatesodium 4-methyl-2-oxopentanoatebenzyl 4-methyl-2-oxopentanoate1-benzyl 4-methyl (E)-2-isobutyl-2-butenedioate2-(2-methoxy-2-oxoethyl)-4-methylpentanoic acidN-alpha-t-BOC-L-tryptophan; (2S)-2-[(tert-butoxycarbonyl)amino]-3-(1H-indol-3-yl)propionic acidtert-butyl N-[(1S)-1-(1H-indol-3-ylmethyl)-2-(methylamino)-2-oxoethyl]carbamate(2S)-2-amino-3-(1H-indol-3-yl)-N-methylpropanamidemethyl (3R)-3-([[(1S)-1-(1H-indol-3-ylmethyl)-2-(methylamino)-2-oxoethyl]amino]carbonyl)-5-methylhexanoate
