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