Ethyl 4-cyano-5-fluoro-2-(trifluoromethoxy)pyridine-3-carboxylate
5-Chloro-3-(difluoromethyl)-4-(trifluoromethoxy)pyridine-2-acetonitrile
3-Chloro-5-(difluoromethyl)-2-(trifluoromethoxy)pyridine-4-acetonitrile
3-Chloro-2-(difluoromethyl)-4-(trifluoromethoxy)pyridine-5-acetonitrile