Soto-Monsalve, MónicaRomero, Elkin L.Zuluaga, FabioChaur, Manuel N.D’Vries, Richard F.2019-08-062019-08-0620171600-5368https://repositorio.usc.edu.co/handle/20.500.12421/486In the title compound, C 18 H 20 N 2 O 7 , the dihedral angle between the aromatic rings is 7.28 (7)° and the almost planar conformation of the molecule is supported by an intramolecular O—H...O hydrogen bond, which closes an S (6) ring. In the crystal, weak C—H...O hydrogen bonds and aromatic π–π stacking link the molecules into a three-dimensional network. A Hirshfeld surface analysis showed that the major contribution to the intermolecular interactions are van der Waals interactions (H...H contacts), accounting for 48.4% of the surface.encrystal structureHirshfeld surfacesupramolecular structureallylideneArticle