36145-08-1 BAY-Hox 2709 Chlorprazophos EINECS 252-889-1 O-(3-Chloro-7-methylpyrazolo(1,5-a)pyrimidin-2-yl) O,O-diethyl thiophosphate Phosphorothioic acid, O-(3-chloro-7-methylpyrazolo(1,5-a)pyrimidin-2-yl) O,O-diethyl ester