5-Hept-2-yn-(Z)-ylidene-1-hex-1-ynyl-cyclopentene

5-[4-Methoxy-but-2-yn-(Z)-ylidene]-1-(3-methoxy-prop-1-ynyl)-cyclopentene

1-Trimethylsilanylethynyl-5-[3-trimethylsilanyl-prop-2-yn-(Z)-ylidene]-cyclopentene

(Z)-(3-(2-(cyclohexylethynyl)cyclopent-2-en-1-ylidene)prop-1-yn-1-yl)cyclohexane

1-Phenylethynyl-2-[3-trimethylsilanyl-prop-2-yn-(Z)-ylidene]-cyclopentanol