3-Fluoro-5-(pyridin-4-yl)isonicotinaldehyde
3-Fluoro-5-(pyridin-3-yl)isonicotinaldehyde
5-Fluoro-3-(pyridin-4-yl)picolinaldehyde
5-Fluoro-3-(pyridin-3-yl)picolinaldehyde
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