4,4-二氟环已酮

3-溴-4-氯呋喃并[3,2-c]吡啶

4,5-二氢-4-氧代呋喃[3,2]吡啶

2-[2-(furan-2-yl)ethenyl]chromen-4-one

2-乙炔呋喃