5-(Difluoromethyl)-3-nitro-4-(trifluoromethoxy)pyridine-2-sulfonamide
5-(Difluoromethyl)-4-nitro-3-(trifluoromethoxy)pyridine-2-sulfonamide
4-(Bromomethyl)-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine-5-acetic acid
3-(Difluoromethyl)-4-nitro-2-(trifluoromethoxy)pyridine-5-sulfonamide