dimethyl 2-(7-hydroxyhept-2-yn-1-yl)-2-(4-phenylbuta-2,3-dien-1-yl)malonate

dimethyl 2-(7-oxohept-2-yn-1-yl)-2-(penta-2,3-dien-1-yl)malonate

dimethyl 2-(7-((tert-butyldimethylsilyl)oxy)hept-2-yn-1-yl)-2-(3-hydroxy-6,6-dimethylhept-4-yn-1-yl)malonate

dimethyl 2-(7-((tert-butyldimethylsilyl)oxy)hept-2-yn-1-yl)-2-(6,6-dimethylhepta-3,4-dien-1-yl)malonate