Tritert-butyl 11-[[4-[[11-(5-ethoxy-5-oxopentyl)-4,8-bis[(2-methylpropan-2-yl)oxycarbonyl]-1,4,8,11-tetrazacyclotetradec-1-yl]methyl]phenyl]methyl]-1,4,8,11-tetrazacyclotetradecane-1,4,8-tricarboxylate 在
三氟乙酸 作用下,
以
二氯甲烷 为溶剂,
以100%的产率得到5-{11-[4-(1,4,8,11-Tetraaza-cyclotetradec-1-ylmethyl)-benzyl]-1,4,8,11-tetraaza-cyclotetradec-1-yl}-pentanoic acid ethyl ester