(E)-deca-1,4-dien-3-one

(E)-2-(hept-1-en-1-yl)-2-vinyl-1,3-dioxolane

二氢-5-甲基-5-戊基呋喃-2(3H)-酮

acetic acid,4-methylidenenon-1-yn-3-ol

2-环戊烯酮