2-甲基-2-丙基4-戊烯-1-基氨基甲酸酯

hept-6-en-3-one

5-[(2-oxocyclopentyl)methyl]oxolan-2-one

2-acetyl-2-pent-4-enoylcyclohexan-1-one

(2-pent-4-enoylcyclohexen-1-yl) acetate