646052-69-9

1,4,8,11-Tetraazacyclotetradecane-1,4,8-tricarboxylic acid,11-[6-[2-[[(1,1-dimethylethoxy)carbonyl]amino]ethyl]-12,12-dimethyl-2,10-dioxo-11-oxa-3,6,9-triazatridec-1-yl]-, tris(1,1-dimethylethyl) ester