137203-80-6 3,6,9,12,Tetraazatetracosanoic acid, 3,6,9,12-tetrakis(carboxymethyl)- 3,6,9,12-Tetrakis(carboxymethyl)-3,6,9,12,tetraazatetracosanoic acid C22TT Docosyl-triethylenetetraminepentaacetic acid