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PROCESS FOR PREPARING 0-METHYL-0-ETHYL-2,2,2-TRICHLORO-1-HYDROXYETHYL-PHOSPHONATE,0,0-DIETHYL-2,2,2-TRICHLORO-1-HYDROXYETHYL-PHOSPHONATE AND 0,0-DIMETHYL-2,2,2-TRICHLORO-1-HYDROXYETHYL-PHOSPHONATE
PROCESS FOR PREPARING 0-METHYL-0-ETHYL-2,2,2-TRICHLORO-1-HYDROXYETHYL-PHOSPHONATE,0,0-DIETHYL-2,2,2-TRICHLORO-1-HYDROXYETHYL-PHOSPHONATE AND 0,0-DIMETHYL-2,2,2-TRICHLORO-1-HYDROXYETHYL-PHOSPHONATE