4-(Difluoromethyl)-5-methoxy-2-nitropyridine-3-sulfonamide
2-(Bromomethyl)-3-(difluoromethyl)-4-(trifluoromethoxy)pyridine-6-sulfonamide
5-(Difluoromethyl)-2-methoxy-3-nitropyridine-4-sulfonamide
4-(Difluoromethyl)-3-methoxy-2-nitropyridine-6-sulfonamide