title: (4R*,4aR*,7aS*)-5-Oxo-6-phenyl-4a,5,6,7,7a,8-hexa-hydro-4H-furo[2,3-f]isoindole-4-carb-oxy-lic acid.
abstract: The asymmetric unit of the title compound, C(17)H(15)NO(4), contains two independent mol-ecules with similar geometric parameters. In both mol-ecules, the conformation of the cyclo-hexene ring is half-chair, while the pyrrolidinone ring adopts an envelope conformation with the γ-carbon atom of the α-pyrrolidinone ring as the flap. In the crystal, O-H⋯O hydrogen bonds between the carb-oxylic and carbonyl groups link alternate independent mol-ecules into chains propagating in the b-axis direction. The crystal packing also features weak C-H⋯π inter-actions.
authors: Department of Organic Chemistry, Ivan Franko National University of Lviv, Kyryla and Mefodiya 6, Lviv 79005,  Ukraine.
authors: Yuriy I
authors: YI
authors: Horak
authors: Roman Z
authors: RZ
authors: Lytvyn
authors: Fedor I
authors: FI
authors: Zubkov
authors: Eugeniya V
authors: EV
authors: Nikitina
authors: Yuriy V
authors: YV
authors: Homza
authors: Tadeusz
authors: T
authors: Lis
authors: Vasyl
authors: V
authors: Kinzhybalo
authors: Mykola D
authors: MD
authors: Obushak