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