5-(Difluoromethyl)-2-nitro-4-(trifluoromethoxy)pyridine-3-sulfonamide
6-Nitro-4-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-2-carbonyl chloride
4-(Difluoromethyl)-5-nitro-2-(trifluoromethoxy)pyridine-3-sulfonamide
6-(Bromomethyl)-4-(difluoromethyl)-2-(trifluoromethoxy)pyridine-3-acetonitrile