N-benzyliminodi(methylenephosphonic) acid, N-benzylimino(bismethylenephosphonic acid), benzylamino-N,N-bis methylphosphonic acid, Benzyliminobis(methylene)bisphosphonic acid, N-benzylimino-bis(methylphosphonic) acid, N-benzyliminobis(methylenephophonic acid), benzyl-phosphonomethyl-amino-methyl-phosphonic acid