1,4,5,8-Tetra­methoxy­anthracene

The structure of the title compound, C18H18O4, consists of separate centrosymmetric planar mol­ecules arranged in columns parallel to the monoclinic unique axis. The normal to the mean molecular plane lies at 55.4° to the unique axis, giving adjacent columns with alternating stacking directions. The mean deviation of all non-H atoms from the least-squares molecular plane is 0.064 A. Bond lengths in the aromatic rings range from 1.347 (2) to 1.440 (2) A and the two unique Me—O bond distances are 1.418 (2) and 1.419 (2) A.