(
N-glycyl-L-aspartic acid )-1-methyl ester-4-amide 、
2-acetoxy-2-bromo-propionic acid ethyl ester 在
sodium methylate 作用下,
生成
N2-[
N-(1-carboxy-1-hydroxy-ethyl)-glycyl]-L-asparagine ; {
N-[
N-(1-hydroxy-1-carboxy-ethyl)-glycyl]-L-aspartic acid }-4-amide