2-(Chloromethyl)-5-(difluoromethyl)-4-methoxypyridine-3-carboxaldehyde
6-(Chloromethyl)-4-(difluoromethyl)-2-methoxypyridine-3-carboxaldehyde
2-(Chloromethyl)-3-(difluoromethyl)-6-methoxypyridine-5-carboxaldehyde
2-(Chloromethyl)-3-(difluoromethyl)-5-methoxypyridine-4-carboxaldehyde