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