methyl (E)-2-<5-(cyclohex-1-en-1-yl)tetrahydrofuran-2-ylidene>propionate

(Z)-<(carboethoxy)methylidene>-2-hydroxycyclohexane

(E)-2-(tert-butyldimethylsiloxy)<(chloromethyl)methylidene>cyclohexane

(E)-2-hydroxy<(4-(carbomethoxy)-3-oxopentyl)methylidene>cyclohexane