10-[4-nitro-2-trifluoromethyl(phenyl)carbamoylmethyl]-1,4,7-tris(carboxymethyl)-1,4,7,10-tetraazacyclododecane trifluoroacetate 在
DOWEX 1X
8 200-400 MESH Cl anion exchange resin 作用下,
以
水 为溶剂,
生成
10-[4-nitro-2-trifluoromethyl(phenyl)carbamoylmethyl]-1,4,7-tris(carboxymethyl)-1,4,7,10-tetraazacyclododecane