hexadecaammonium [[3,6,9,12-tetrakis(phosphonatomethyl)-3,6,9,12-tetraazatetradecane-1,14-diyl]bis[nitrilobis(methylene)]]tetrakisphosphonate

[[3,6,9,12-Tetrakis(phosphonomethyl)-3,6,9,12-tetraazatetradecane-1,14-diyl]bis(nitrilobismethylene)]tetrakisphosphonic acid hexadecaammonium salt