9,9'-spirobi[fluorene]-2-carbaldehyde

1-(chloromethoxymethyl)-5-fluoropyrimidine-2,4-dione

3-溴-2,4-二甲氧基苯甲醛

5-氟-1H-吡咯并[2,3-b]吡啶-3-甲醛

4-氯苯甲醛