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