Methyl 4-hydroxy-3-[4-methoxy-2(methoxymethyleneoxy)phenyl]-2-{[4-methoxy-2-(methoxymethyleneoxy)phenyl]methyl}-5-oxo-2,5-dihydrofuran-2-carboxylate

The title compound, C25H28O11, is formed by a homoaldol condensation of methyl [4-methoxy-2-(methoxymethylenoxy)phenyl]pyruvate followed by lactonization, The structure consists of a butenolide ring substituted at the 2 position by an arylmethyl and a methyl carboxylate group, at the 3 position by an aryl group and at the 2 position by a hydroxyl group. The solid-state structure contains a hydrogen-bonded cyclic dimer. The hydrogen bonds are formed between the enol H atom of one molecule and the lactone carbonyl O atom of another.