4,5-二溴-1,2,6,7-四氢-8H-茚并[5,4-b]呋喃-8-酮

6,7-dihydro-8H-indeno-[5,4-b]furan-8-one

甲醛

1-(2,3-dihydrobenzofuran-4-yl)ethanone

1-(2,3-dihydrobenzofuran-4-yl)prop-2-en-1-one