Methyl 4-(chloromethyl)-3-(difluoromethyl)-2-methylpyridine-5-carboxylate
Methyl 4-(chloromethyl)-6-(difluoromethyl)-2-methylpyridine-3-carboxylate
Methyl 4-(chloromethyl)-2-(difluoromethyl)-6-methylpyridine-3-carboxylate
Methyl 4-(chloromethyl)-6-(difluoromethyl)-3-methylpyridine-2-carboxylate