3-Bromo-6-chloro-2-(difluoromethyl)pyridine-4-sulfonyl chloride
4-Bromo-5-chloro-2-(difluoromethyl)pyridine-3-sulfonyl chloride
5-Bromo-3-chloro-2-(difluoromethyl)pyridine-4-sulfonyl chloride
2-Bromo-3-(bromomethyl)-4-chloro-5-(difluoromethyl)pyridine