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