4321-64-6 BRN 2290327 Desmethyl fenitrothion Desmethyl sumithion O-Demethyl fenitrothion Phosphorothioic acid, O-methyl O-(3-methyl-4-nitrophenyl) ester (9CI) Phosphorothioic acid, O-methyl O-(4-nitro-m-tolyl) ester