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