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