2-Methyl-1-(4-methyl-phenyl-sulfinyl)naphtho-[2,1-b]furan.

In the title compound, C(20)H(16)O(2)S, the 4-methyl-phenyl ring makes a dihedral angle of 82.60 (4)° with the mean plane [r.m.s. deviation = 0.007 (1) Å] of the naphtho-furan fragment. In the crystal, mol-ecules are linked by weak inter-molecular C-H⋯O hydrogen bonds, and by a slipped π-π inter-action between the central naphtho-furan benzene rings of neighbouring mol-ecules [centroid-to-centroid distance = 3.671 (2) Å, inter-planar distance = 3.349 (2) Å and slippage = 1.503 (2)°].