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