4-(4-ethynyl-phenylethynyl)-benzoic acid 2-hydroxymethyl-4-isopropylidene-5-oxo-tetrahydro-furan-2-ylmethyl ester

{2-[(4-methoxyphenoxy)methyl]-4-(methylethylidene)-5-oxo-2-2,3-dihydrofuryl}methyl 4-[2-(4-ethynylphenyl)ethynyl]benzoate