3-Chloro-5-(difluoromethyl)-4-nitro-2-(trifluoromethoxy)pyridine
3-Cyano-5-(difluoromethyl)-4-methyl-2-(trifluoromethoxy)pyridine
4-Chloro-6-(difluoromethyl)-2-(trifluoromethoxy)pyridine-3-acetonitrile
5-Chloro-3-(difluoromethyl)-2-(trifluoromethoxy)pyridine-4-acetonitrile