(2E)-4-Oxo-2-butenoic acid

3-(furan-2-yl)propanal

3-[5-(3-oxo-propyl)-furan-2-yl]-propionaldehyde

7-oxa-bicyclo[2.2.1]hept-5-ene-2-carbaldehyde

2-氧代-N,2-二苯基-乙酰胺