7508-73-8 Bis-parathion NSC404163 O,O-Bis(4-nitrophenyl) O-ethyl phosphorothioate O,O-Bis-p-nitrofenyl-O-ethylester kyseliny thiofosforecne O-Ethyl O,O-bis(p-nitrophenyl) phosphorothioate Phosphorothioic acid, O,O-bis(p-nitrophenyl) O-ethyl ester Phosphorothioic acid, O,O-bis[p-nitrophenyl] O-ethyl ester Phosphorothioic acid, O-ethyl O,O-bis(4-nitrophenyl) ester WLN: WNR DOPS&O2&OR DNW