2,2',2''-[(2,4,6-Trimeth-oxy-benzene-1,3,5-tri-yl)tris-(methyl-ene)]tris-(isoindole-1,3-dione).

The title mol-ecule, C36H27N3O9, adopts an almost symmetric conformation in which the mean planes of the phthalimido units are inclined at dihedral angles of 81.1†(1), 85.3†(1) and 86.3†(1)° with respect to the plane of the central aromatic ring. The O atoms are involved in intra- and inter-molecular C-H⋯O hydrogen bonding. The crystal structure also features π-π arene inter-actions [minimum ring centroid separation = 3.683†(2)†à ]. The present mode of non-covalent interactions leads to a three-dimensional supramolecular architecture.