O,O-Dimethyl-S-(6-chloro-oxazolo(4,5-b)pyridin-2(3H)-on-3-yl-methyl)-thiophosphate Oxazolo(4,5-b)pyridin-2(3H)-one, 6-chloro-4-mercaptomethyl-, S-ester with dimethylphosphorothioate RQ5834780