4-(2-methylcyclopent-4-ene-1,3-dione-yl)butanoic acid, N-succinimidyl ester 、
[2-(4-Amino-butyl)-4,7-bis-carboxymethyl-[1,4,7]triazonan-1-yl]-acetic acid 在
氢氧化钾 作用下,
以
1,4-二氧六环 为溶剂,
以5 mg的产率得到(4,7-Bis-carboxymethyl-2-{4-[4-(1-methyl-2,5-dioxo-cyclopent-3-enyl)-butyrylamino]-butyl}-[1,4,7]triazonan-1-yl)-acetic acid