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