Methyl 3-ethylidene-4-trimethylsilylmethylenecyclopentan-1,1-dicarboxylate

dimethyl (E)-2-(penta-2,4-dien-1-yl)-2-(3-(trimethylsilyl)prop-2-yn-1-yl)malonate

2-Hepta-2,6-diynyl-2-prop-2-ynyl-malonic acid dimethyl ester

2-Octa-2,7-diynyl-2-prop-2-ynyl-malonic acid dimethyl ester

2-Non-8-en-2-ynyl-2-prop-2-ynyl-malonic acid dimethyl ester