4-(Difluoromethyl)-2-hydroxypyridine-5-carboxaldehyde
4-(Difluoromethyl)-2-hydroxypyridine-3-carboxaldehyde
5-(Difluoromethyl)-3-hydroxypyridine-2-carboxaldehyde
3-(Difluoromethyl)-5-hydroxypyridine-4-carboxaldehyde
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