title: 4-Hydr-oxy-3-(1'-methyl-2-oxo-4'-phenyl-spiro-[indoline-3,2'-pyrrolidine]-3'-yl-carbon-yl)quinolin-2(1H)-one.
abstract: In the title compound, C(28)H(23)N(3)O(4), the dihedral angle between the quinoline and indole ring systems is 29.30 (5)°. The pyrrolidine ring adopts a twist conformation. An intra-molecular O-H⋯O hydrogen bond generates an S(6) ring motif. A weak intra-molecular C3-H3⋯O3 inter-action is also observed. In the crystal, mol-ecules are linked by two sets of N-H⋯O hydrogen bonds, forming centrosymmetric dimers containing two R(2) (2)(8) ring motifs. The dimers are linked via C-H⋯π inter-actions.
authors.forename: K
authors.initials: K
authors.lastname: Revathi
authors.forename: M
authors.initials: M
authors.lastname: Sankaran
authors.forename: P
authors.initials: P
authors.lastname: Ramesh
authors.forename: P S
authors.initials: PS
authors.lastname: Mohan
authors.forename: M N
authors.initials: MN
authors.lastname: Ponnuswamy