3-乙氧基-2-环己烯-1-酮

1,3-环己二酮

4-pent-4-enylcyclohexane-1,3-dione

3-ethoxy-6-pent-4-enylcyclohex-2-en-1-one

(3-oxo-4-pent-4-enylcyclohexen-1-yl) acetate