title: 10-Hydr-oxy-2-aza-penta-cyclo-[10.8.0.0.0.0]icosa-1(12),4(9),5,7,13,15(20),16,18-octa-ene-3,11-dione.
abstract: In the title compound, C(19)H(11)NO(3), the isoindolinone ring system is approximately planar with a maximum atomic deviation of 0.071 (1) Å and the five-membered ring of the dihydro-benzo[g]indol-3-one unit assumes an envelope conformation. The naphthalene ring system makes a dihedral angle of 39.47 (4)° with the mean plane of the isoindolinone system. Inter-molecular O-H⋯O and C-H⋯O hydrogen bonding helps to stabilize the crystal structure.
authors.forename: Saeedeh
authors.initials: S
authors.lastname: Hashemian
authors.forename: Behrouz
authors.initials: B
authors.lastname: Notash