3-Chloro-2-(pyridin-3-yl)isonicotinaldehyde
5-Chloro-6-(pyridin-4-yl)nicotinaldehyde
3-Chloro-2-(pyridin-4-yl)isonicotinaldehyde
3,6-Di(pyridin-4-yl)picolinaldehyde
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