3,5-dinitrobenzoic acid 4-isopropylidene cyclohex-1-enylmethyl ester

6-isopropylidene-1-oxa-spiro[2.5]octane

4-propan-2-ylidenecyclohexan-1-one

8-propan-2-ylidene-1,4-dioxaspiro[4.5]decane

trifluoromethanesulfonic acid 4-isopropylidenecyclohex-1-enyl ester