1,5-Bis(dibutylphosphonoformamido)naphthalene 1,5-Naphthylenedicarbamoylbis(dibutylphosphonate) 2231-13-2 NSC203391 Phosphonic acid, 1,5-naphthylenedicarbamoyldi-, tetrabutyl ester Phosphonic acid, [1,5-naphthylenebis(iminocarbonyl)]di-, tetrabutyl ester WLN: L66J BMVPO&O4&O4 GMVPO&O4&O4