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