37934-13-7 BRN 0993435 O,O-Dimethyl S-((5-ethyl-1,3,4-oxadiazol-2-yl)methyl) phosphorodithioate Phosphorodithioic acid, O,O-dimethyl S-((5-ethyl-1,3,4-oxadiazol-2-yl)methyl ester