2-Bromo-6-cyano-3-(difluoromethyl)-4-(trifluoromethyl)pyridine
6-Bromo-3-cyano-2-(difluoromethyl)-4-(trifluoromethyl)pyridine
2-Bromo-5-cyano-4-(difluoromethyl)-3-(trifluoromethyl)pyridine
2-Bromo-5-cyano-3-(difluoromethyl)-4-(trifluoromethyl)pyridine