2,2'-[1,2-Ethynediylbis(oxy)]bis[2-methylpropane] Di-tert-butoxyethyne Di-t-butoxyacetylene Di-t-butoxyethyne 1,2-Bis(tert-butoxy)acetylene Propane, 2-[[2-(1,1-dimethylethoxy)ethynyl]oxy]-2-methyl-