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