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