3-{2-[2-(2-methoxyethoxy)ethoxy]ethyl}-L-serine 1-[(1H,1H,2H,2H,4H,4H,-3,6,9,12-tetraoxaperfluorotridecyl)methyl]amide   、                                                                                      
1,4,7-tris(carboxylatomethyl)-10-[1-carboxy-3-aza-4-oxo-5-methylpentan-5-yl]-1,4,7,10-tetraazacyclododecane, Gd complex                                                                                                                                                              在
                                                                                                                                                                                 
N-羟基丁二酰亚胺   、                                                                                                  
N,N'-二环己基碳二亚胺   、                                                                                                  
lithium chloride                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二甲基亚砜                                                                                  为溶剂,
                                                                                                                                                    反应 16.0h,
                                                                                                                以58%的产率得到N-[1,4,7-Tris(carboxylatomethyl)-1,4,7,10-tetraazacyclododecane-10-N-(pentanoyl-3-aza-4-oxo-5-methyl-5-yl)]-3-{2-[2-(2-methoxyethoxy)ethoxy]ethyl}-L-serine 1-[(1H 1H,2H,2H,4H,4H,-3,6,9,12-tetraoxaperfluorotridecyl)methyl]amide, Gd complex