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