title: 6-Hy-droxy-1,2-dihydro-4H-pyrrolo-[3,2,1-ij]quinolin-4-one.
abstract: The mol-ecule of the title compound, C11H9NO2, is essentially planar [r.m.s. deviation of the non-H atoms = 0.056 (1) Å]. In the crystal, strong O-H⋯O hydrogen bonds form zigzag chains along the b axis. The mol-ecules form stacks along the a axis due to π-π inter-actions, the shortest distance between the centroids of the benzene and pyridinone rings being 3.6146 (7) Å.
authors.affiliation: Department of Chemistry, Moscow State University, Moscow 119992, Russian Federation.
authors.forename: Victor B
authors.initials: VB
authors.lastname: Rybakov
authors.forename: Svitlana V
authors.initials: SV
authors.lastname: Shishkina
authors.forename: Igor V
authors.initials: IV
authors.lastname: Ukrainets
authors.forename: Olga V
authors.initials: OV
authors.lastname: Gorokhova
authors.forename: Xeniya V
authors.initials: XV
authors.lastname: Andreeva