4-Fluoro-2-nitro-3-(trifluoromethoxy)pyridine-5-sulfonamide
3-(Difluoromethyl)-6-fluoro-4-methoxy-2-(trifluoromethoxy)pyridine
3-Fluoro-5-nitro-2-(trifluoromethoxy)pyridine-4-sulfonamide
4-(Difluoromethyl)-5-fluoro-3-methoxy-2-(trifluoromethoxy)pyridine