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