38527-91-2 65900-18-7 66230-64-6 BRN 2336790 Etafos Etaphos Ethaphos O-(2,4-Dichlorophenyl) O-ethyl S-propyl phosphorothioate Phosphorothioic acid, O-(2,4-dichlorophenyl) O-ethyl S-propyl ester Prothiofos-oxon Tokuthion oxon