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