上游原料
(2R,4R)-4-hydroxy-2-pyrrolidinecarboxylic acidethyl (2R,4R)-4-hydroxy-2-pyrrolidinecarboxylateethyl (2R,4R)-1-benzyl-4-hydroxy-2-pyrrolidinecarboxylateethyl (2R)-1-benzyl-4-oxo-2-pyrrolidinecarboxylateethyl (8R)-7-benzyl-2,4-dioxo-1,3,7-triazaspiro[4.4]nonane-8-carboxylatediethyl (2R,4R)-4-amino-1-benzyl-2,4-pyrrolidinedicarboxylatediethyl (2R,4R)-1-benzyl-4-[(tert-butoxycarbonyl)amino]-2,4-pyrrolidinedicarboxylatediethyl (2R,4R)-4-[(tert-butoxycarbonyl)amino]-2,4-pyrrolidinedicarboxylate1-(Chloromethyl)naphthalenediethyl (2R,4R)-4-[(tert-butoxycarbonyl)amino]-1-(1-naphthylmethyl)-2,4-pyrrolidinedicarboxylatediethyl (2R,4R)-4-amino-1-(1-naphthylmethyl)-2,4-pyrrolidinedicarboxylate
