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