dodeca-5,7-dien-1-ol

ethyl 5-(1,4-dioxaspiro[4.5]dec-7-en-8-yl)pentanoate

ethyl 5-(1,4-dioxaspiro[4.5]dec-6-en-8-yl)pentanoate

ethyl 5-(4-oxocyclohexen-1-yl)pentanoate

ethyl 5-(4-oxocyclohex-2-en-1-yl)pentanoate