3-(Difluoromethyl)-2-hydroxy-5-nitropyridine-4-sulfonamide
5-(Chloromethyl)-2-(difluoromethyl)-3-hydroxy-6-(trifluoromethyl)pyridine
3-(Chloromethyl)-5-(difluoromethyl)-6-hydroxy-2-(trifluoromethyl)pyridine
4-(Difluoromethyl)-3-hydroxy-6-nitropyridine-2-carboxamide