Ethyl 4-(difluoromethyl)-2,3-dihydroxypyridine-6-acetate
Ethyl 4-(difluoromethyl)-2,3-dihydroxypyridine-5-acetate
Methyl 4-(difluoromethyl)-3,5-dihydroxypyridine-2-acetate
Methyl 2-(difluoromethyl)-3,5-dihydroxypyridine-6-acetate
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