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