154024-43-8

1,4,7,10-Tetraazacyclododecane-1,4,7,10-tetraacetic acid,2-[[4-[[[[5-(hexahydro-2-oxo-1H-thieno[3,4-d]imidazol-4-yl)-1-oxopentyl]methylamino]acetyl]amino]phenyl]methyl]-