31875-39-5 BRN 0529309 O,O-Dimethyl S-((5-methyl-1,3,4-oxadiazol-2-yl)methyl) phosphorodithioate Phosphorodithioic acid, O,O-dimethyl S-((5-methyl-1,3,4-oxadiazol-2-yl)methyl) ester