title: Semisynthetic roxburghin tetra-methyl ether.
abstract: The title mol-ecule, (E)-2,3',4,5-tetra-methoxy-stilbene, C(18)H(20)O(4), is virtually planar. The angle between the two benzene rings is 4.06 (6)°. The inter-molecular inter-actions present in the structure are weak. There are C-H⋯O hydrogen bonds and C-H⋯π-electron ring inter-actions. The mol-ecules are ordered into planes that are parallel to (01). The distance between adjacent planes is about 3.3 Å and therefore π-π electron inter-actions between the aromatic planes are also plausible.
authors.forename: Alex
authors.initials: A
authors.lastname: Saez
authors.forename: Carmen
authors.initials: C
authors.lastname: Ramirez de Arellano
authors.forename: Noureddine
authors.initials: N
authors.lastname: El Aouad
authors.forename: Silvia
authors.initials: S
authors.lastname: Rodriguez
authors.forename: Felipe
authors.initials: F
authors.lastname: Otalvaro
authors.forename: Diego
authors.initials: D
authors.lastname: Cortes
authors.forename: Jairo
authors.initials: J
authors.lastname: Saez