Ethyl 3-(chloromethyl)-2-(difluoromethyl)-4-methoxypyridine-5-carboxylate
5-(Chloromethyl)-2-(difluoromethyl)-3-methoxypyridine-6-carboxaldehyde
4-(Difluoromethyl)-2-iodo-5-(trifluoromethoxy)pyridine
4-(Chloromethyl)-3-(difluoromethyl)-6-methoxypyridine-2-carboxaldehyde