6-Chloro-3-(difluoromethyl)-2-hydroxypyridine-4-sulfonamide
2-Chloro-5-(difluoromethyl)-3-hydroxypyridine-6-sulfonamide
2-Bromo-3-(difluoromethyl)-6-(trifluoromethyl)pyridine-4-methanol
3-Chloro-6-(difluoromethyl)-2-hydroxypyridine-5-sulfonyl chloride