2-(Difluoromethyl)-4,5-dihydroxypyridine-3-carboxaldehyde
6-(Difluoromethyl)-3,4-dihydroxypyridine-2-carboxaldehyde
5-(Difluoromethyl)-3,4-dihydroxypyridine-2-carboxaldehyde
3-(Difluoromethyl)-4,5-dihydroxypyridine-2-carboxaldehyde
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