triethylenetetraminehexamethylphosphonic acid;N,N,N',N'',N''',N'''-Hexakis-
-1,8-diamino-3,6-diaza-octan;(ethane-1,2-diylbis{[(phosphonomethyl)imino]ethane-2,1-diylnitrilobis(methylene)})tetrakisphosphonic acid;(Ethane-1,2-diylbis(((phosphonomethyl)imino)ethane-2,1-diylnitrilobis(methylene)))tetrakisphosphonic acid;[2-[bis(phosphonomethyl)amino]ethyl-[2-[2-[bis(phosphonomethyl)amino]ethyl-(phosphonomethyl)amino]ethyl]amino]methylphosphonic acid