5,6-Bis(2,3-difluorophenyl)nicotinaldehyde
2,5-Bis(2,3-difluorophenyl)nicotinaldehyde
2,6-Bis(2,3-difluorophenyl)isonicotinaldehyde
2,3-Bis(2,3-difluorophenyl)isonicotinaldehyde
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