1-(2-Hydroxy-4-methyl-pentanoylamino)-cyclopropanecarboxylic acid 1-[(1-{[1-(1-carboxy-2-hydroxy-propylcarbamoyl)-2-methyl-propyl]-methyl-carbamoyl}-4-hydroxy-3-methyl-butyl)-methyl-carbamoyl]-3-methyl-butyl ester 在
吡啶 作用下,
生成
1-(2-Acetoxy-4-methyl-pentanoylamino)-cyclopropanecarboxylic acid 1-[(4-acetoxy-1-{[1-(2-acetoxy-1-methoxycarbonyl-propylcarbamoyl)-2-methyl-propyl]-methyl-carbamoyl}-3-methyl-butyl)-methyl-carbamoyl]-3-methyl-butyl ester