methyl N-(5-aminopentanoyl)-S-methyl-L-cysteinate 、
2-{tert-butoxyoxalyl-[4-(2-carboxy-2-methoxycarbonylamino-ethyl)-naphthalen-1-yl]-amino}-benzoic acid benzhydryl ester 、 5-{[2-(acetylamino)-3-(4-{2-[(benzhydryloxy)carbonyl][tert-butoxy(oxo)acetyl]anilino}-3-ethylphenyl)propanoyl]amino}pentanoic acid 生成 Methyl N-(5-{[3-(4-{{2-[(benzhydryloxy)carbonyl]phenyl}[tert-butoxy(oxo)acetyl]amino }-1-naphthyl)-N-(methoxycarbonyl)alanyl]amino}pentanoyl)-L-methioninate