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