Methyl 2-(difluoromethyl)-3-methoxy-4-methylpyridine-6-carboxylate
5-(Chloromethyl)-3-(difluoromethyl)-4-iodopyridine-2-carboxaldehyde
2-(Chloromethyl)-6-(difluoromethyl)-3-iodopyridine-4-carboxaldehyde
2-(Chloromethyl)-4-(difluoromethyl)-3-iodopyridine-5-carboxaldehyde