O-(3-chloro-7-methylpyrazolo[1,5-a]pyrimidin-2-yl) O,O-diethyl phosphorothioate, (3-chloro-6-methylpyrazolo[1,5-a]pyrimidin-2-yl)oxy-diethoxy-sulfanylidene-λ<sup>5</sup>-phosphane, Chlorprazophos [ISO], Phosphorothioic acid,O-(3-chloro-7-methylpyrazolo(1,5-a)pyrimidin-2-yl) O,O-diethyl ester, thiophosphoric acid O-(3-chloro-7-methyl-pyrazolo[1,5-a]pyrimidin-2-yl) ester O',O''-diethyl ester, (3-chloro-6-methylpyrazolo[1,5-a]pyrimidin-2-yl)oxy-diethoxy-sulfanylidene, Chlorprazophos, O-(3-Chloro-7-methylpyrazolo(1,5-a)pyrimidin-2-yl) O,O-diethyl thiophosphate