5-(but-1’-en-4’-yl)dihydrofuran-2(3H)-one

5-甲基-2(3H)-呋喃酮

4-prop-2-enylaniline

ethyl 2-acetyl-2-methylpent-4-enoate

2-乙酰基-2-丙-2-烯基戊-4-烯酸乙酯