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