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