3-Chloro-2-(difluoromethyl)-4,5-dihydroxypyridine
2-Chloro-6-(difluoromethyl)-3,4-dihydroxypyridine
2-Chloro-5-(difluoromethyl)-3,4-dihydroxypyridine
4-Chloro-3-(difluoromethyl)-2,6-dihydroxypyridine
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