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