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