5-Bromo-2-cyano-4-(difluoromethyl)-3-(trifluoromethoxy)pyridine
4-Bromo-2-chloro-3-(difluoromethyl)-5-(trifluoromethoxy)pyridine
4-Bromo-5-cyano-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine
3-Bromo-5-chloro-2-(difluoromethyl)-4-(trifluoromethoxy)pyridine