Ethyl 3-chloro-4-(difluoromethyl)-6-hydroxypyridine-2-acetate
3-Chloro-6-(difluoromethyl)-2-nitropyridine-5-sulfonamide
5-Chloro-3-(difluoromethyl)-4-hydroxypyridine-2-sulfonyl chloride
2-Chloro-6-(difluoromethyl)-3-hydroxypyridine-4-sulfonyl chloride