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