2-(2-Methylcyclopenten-1-yl)-3-butyn-2-ol

Ethyl 1-methyl-2-(1-methyl-2-propyn-1-ylidene)-cyclopentane-1-acetate

6α,3β,2β-Trimethyl-2α-vinyl(1α,6α)-tricyclo<4.3.0.01.3>nonan-4-one

3-Hydroxy-3-(2-methylcyclopenten-1-yl)-1-trimethylsilyl-1-butyne

{1-Methyl-2-[1-methyl-prop-2-en-(Z)-ylidene]-cyclopentyl}-acetyl chloride