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