38090-81-2 BRN 0999366 O,O-Dimethyl S-((5-methoxy-1,3,4-thiadiazol-2-yl)methyl) phosphorodithioate Phosphorodithioic acid, O,O-dimethyl S-((5-methoxy-1,3,4-thiadiazol-2-yl)methyl) ester