Crystal structure of De-hydro-dieugenol B methyl ether, a neolignan from Nectandra leucantha Nees and Mart (Lauraceae).

In the title compound, C(21)H(24)O(4) (systematic name: 4,5'-diallyl-2,2',3'-tri-meth-oxy-diphenyl ether), the aromatic rings lie almost perpendicular to each other [dihedral angle = 85.96†(2)°]. The allyl side chains show similar configurations, with C(ar)-C-C=C (ar = aromatic) torsion angles of -123.62†(12) and -115.54†(12)°. A possible weak intra-molecular C-H⋯O inter-action is observed. In the crystal, mol-ecules are connected by two C-H⋯O hydrogen bonds, forming undulating layers lying parallel to the bc plane. Weak C-H⋯π and π-π stacking inter-actions also occur.