4-(Difluoromethyl)-6-hydroxy-2-nitropyridine-3-sulfonamide
2-(Difluoromethyl)-4-hydroxy-5-methoxypyridine-3-carbonyl chloride
3-(Difluoromethyl)-4-hydroxy-5-nitropyridine-2-sulfonamide
2-(Difluoromethyl)-3-hydroxy-6-methoxypyridine-5-carbonyl chloride