2-Nitro-4-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-3-sulfonamide
2-Nitro-4-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-6-sulfonamide
2-(Difluoromethyl)-3-nitro-5-(trifluoromethoxy)pyridine-4-acetic acid
2-(Difluoromethyl)-3-nitro-6-(trifluoromethoxy)pyridine-4-acetic acid