Ethyl 4-(chloromethyl)-2-(difluoromethyl)-6-methoxypyridine-3-carboxylate
Ethyl 3-(chloromethyl)-5-(difluoromethyl)-6-methoxypyridine-2-carboxylate
Ethyl 3-(chloromethyl)-4-(difluoromethyl)-6-methoxypyridine-2-carboxylate
Ethyl 2-(chloromethyl)-5-(difluoromethyl)-3-methoxypyridine-6-carboxylate