title: 11-Hy-droxy-9-[1-(4-methyl-phen-yl)-4-oxo-3-phenyl-azetidin-2-yl]-18-oxo-10-oxa-2-aza-penta-cyclo-[9.7.0.0(1,8).0(2,6).0(12,17)]octa-deca-12,14,16-triene-8-carbonitrile.
abstract: In the title compound, C33H29N3O5, the four-membered ring of the β-lactam fragment is essentially planar (r.m.s. deviation = 0.0122 Å), with the carbonyl O atom displaced from this ring by 0.856 (9) Å. The mean planes of the meth-oxy-phenyl and phenyl rings are inclined at dihedral angles 85.10 (7) and 21.56 (14)°, respectively, with respect to the mean plane of the four-membered ring. The pyrrolidine rings adopt envelope conformations with C atoms lying 0.535 (4) and 0.519 (4) Å out of the planes formed by the remaining ring atoms. The furan ring also adopts an envelope conformation with a C atom 0.560 (3) Å out of the plane formed by the remaining ring atoms. The nine-membered indene ring is almost planar (r.m.s. deviation = 0.0240 Å), with the carbonyl O atom displaced by 0.145 (3) Å from this ring. The mol-ecular structure is stabilized by a strong intra-molecular O-H⋯N hydrogen bond and the crystal structure is consolidated by C-H⋯O hydrogen bonds.
authors.affiliation: Centre of Advanced Study in Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India.
authors.forename: Sivasubramanian
authors.initials: S
authors.lastname: Suhitha
authors.forename: Thothadri
authors.initials: T
authors.lastname: Srinivasan
authors.forename: Raju
authors.initials: R
authors.lastname: Rajesh
authors.forename: Raghavachary
authors.initials: R
authors.lastname: Raghunathan
authors.forename: Devadasan
authors.initials: D
authors.lastname: Velmurugan