{4-[(3-tert-Butoxycarbonylamino-propylcarbamoyl)-methyl]-7-methoxycarbonylmethyl-1,4,7,10-tetraaza-cyclododec-1-yl}-acetic acid methyl ester 在
lithium hydroxide 作用下,
以
甲醇 为溶剂,
以78%的产率得到{4-[(3-tert-Butoxycarbonylamino-propylcarbamoyl)-methyl]-7-carboxymethyl-1,4,7,10-tetraaza-cyclododec-1-yl}-acetic acid