(Phenylphosphonyl)dianilide 4707-91-9 Benzenephosphonanilide Benzenephosphondianilide Bis-anilinophenylphosphine oxide N,N',P-Triphenylphosphonic diamide NSC31970 Phosphonic diamide, N,N',P-triphenyl- WLN: OPR&MR&MR