title: 2'-Methyl-3,5-diphenyl-spiro-[4,6-dioxa-2-aza-bicyclo-[3.2.0]hept-2-ene-7,4'-iso-quinoline]-1',3'(2'H,4'H)-dione.
abstract: In the title compound, C(25)H(18)N(2)O(4), the tetra-hydro-pyridine ring adopts a distorted envelope conformation with the spiro C atom at the flap position [deviation = 0.470 (2) Å]. The dihydro-oxazole ring is planar (r.m.s. deviation = 0.013 Å) and it makes dihedral angles of 73.43 (8) and 4.24 (8)° with the two attached phenyl rings. The dihedral angle between oxetane and oxazole planes is 67.44 (9)°. In the crystal structure, C-H⋯O hydrogen bonds link neighbouring mol-ecules into zigzag chains along the b axis and these chains are linked via C-H⋯π inter-actions.
authors.forename: Hoong-Kun
authors.initials: HK
authors.lastname: Fun
authors.forename: Jia Hao
authors.initials: JH
authors.lastname: Goh
authors.forename: Haitao
authors.initials: H
authors.lastname: Yu
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhang