4-[5-(4-Formyl-phen-oxy)pent-oxy]benzaldehyde.

In the title compound, C(20)H(19)O(4), the benzene rings, linked via five methyl-ene C atoms, form a dihedral angle of 77.28†(6)°. In the crystal, mol-ecules are linked via pairs of weak C-H⋯O inter-actions [graph set R(2) (2)(6)] into dimers that are further connected by additional weak C-H⋯O interactions [graph sets R(2) (2)(14), R(2) (2)(26) and R(2) (2)(6)].