title: 17-Hy-droxy-1,8-dimethyl-17-aza-penta-cyclo-[6.6.5.0(2,7).0(9,14).0(15,19)]nona-deca-2,4,6,9(14),10,12-hexa-ene-16,18-dione.
abstract: In the title compound, C20H17NO3 (alternative name: N-hy-droxy-9,10-dimethyl-9,10-ethano-anthracene-11,12-dicarboximide), the rigid ethano-anthracene-dicarboximide moiety has a roof-shaped geometry, the inter-planar angle between the two terminal phenyl rings being 124.9 (6)°. In the crystal, mol-ecules are linked via O-H⋯O hydrogen bonds, forming chains along [010]. C-H⋯O and C-H⋯π inter-actions link adjacent chains, leading to the formation of a three-dimensional structure.
authors.affiliation: Faculty of Chemistry, Maria Curie-Sklodowska University, pl. M. Curie-Sklodowskiej 3, 20-031 Lublin, Poland.
authors.forename: Barbara
authors.initials: B
authors.lastname: Miroslaw
authors.forename: Anna E
authors.initials: AE
authors.lastname: Koziol
authors.forename: Magdalena
authors.initials: M
authors.lastname: Pakosinska-Parys
authors.forename: Marta
authors.initials: M
authors.lastname: Struga