2255-15-4 3-Chloro-4-nitrophenyl dimethyl phosphate Chlorooxon Chloroxon methyl Dimethyl 3-chloro-4-nitrophenyl phosphate Methyl chloroxon Phosphoric acid, 3-chloro-4-nitrophenyl dimethyl ester Phosphoric acid, dimethyl 3-chloro-4-nitrophenyl ester