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