4-Chloro-6-(difluoromethyl)-3-methoxy-2-(trifluoromethoxy)pyridine
4-Cyano-6-nitro-2-(trifluoromethoxy)pyridine-3-sulfonamide
4-Cyano-2-nitro-5-(trifluoromethoxy)pyridine-3-sulfonamide
4-Chloro-2-(difluoromethyl)-3-methoxy-5-(trifluoromethoxy)pyridine