39295-50-6 EPN plus methyl parathion Methyl parathion-epn mixt. Phosphorothioic acid, O,O-dimethyl O-(4-nitrophenyl) ester, mixt with O-ethyl O-(4-nitrophenyl) phenylphosphonothioate Phosphorothioic acid, O,O-dimethyl O-(4-nitrophenyl) ester, mixt. with O- ethyl O-(4-nitrophenyl)phenylphosphonothioate VETO