4-{2-[2-(4-Formyl-2-methoxy­phen­oxy)eth­oxy]eth­oxy}-3-methoxy­benzaldehyde

The title compound, C₂₀H₂₂O₇, was prepared by reaction of 4-hydr­oxy-3-methoxy­benzaldehyde and 1-chloro-2-(2-chloro­ethoxy)ethane. Inter­molecular C—H...O hydrogen-bonding contributes to the stability of the structure in the solid state.