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