6-(Difluoromethyl)-4-hydroxy-3-methoxypyridine-2-sulfonamide
5-(Difluoromethyl)-2-hydroxy-3-methoxypyridine-4-sulfonyl chloride
4-(Difluoromethyl)-3-hydroxy-6-methylpyridine-2-acetonitrile
4-(Difluoromethyl)-6-hydroxy-3-methoxypyridine-2-sulfonyl chloride