、
silver methanesulfonate 反应 2.0h,
以80%的产率得到4-((4S,7S,10S,13S)-10-benzyl-7-isobutyl-15-methyl-13-((R)-2-methyloxirane-2-carbonyl)-2,5,8,11-tetraoxo-4-phenethyl-3,6,9,12-tetraazahexadecanyl)-4-(((4-ethynylbenzoyl)oxy)methyl)morpholin-4-ium methanesulfonate