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