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