Ethyl 2-(difluoromethyl)-3-hydroxypyridine-5-carboxylate
Ethyl 2-(difluoromethyl)-3-hydroxypyridine-4-carboxylate
Methyl 3-(difluoromethyl)-6-hydroxypyridine-2-carboxylate
Methyl 5-(difluoromethyl)-2-hydroxypyridine-4-carboxylate
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