{1'-Phenyl-1',2',5',6',7',7a'-hexa-hydro-spiro-[indeno-[1,2-b]quinoxaline-11,3'-pyrrolizin]-2'-yl}(p-tol-yl)methanone.

In the title compound, C(35)H(29)N(3)O, the quinoxaline and indene systems are essentially planar, with maximum deviations of 0.047 (2) and 0.032 (2) Šfor C atoms, respectively. The quinoxaline system forms a dihedral angle of 4.75 (3)° with the indene system. The pyrrolizine system is folded. The substituted five-membered ring adopts an envelope conformation. In the other five-membered ring, one C atom is disordered with a site-occupancy ratio of 0.676 (12):0.324 (12). In the crystal, mol-ecules are linked via C-H⋯O hydrogen bonds involving the bifurcated carbonyl O atom.

3'-(4-Chloro-benzo-yl)-4'-(4-chloro-phen-yl)-1'-methyl-spiro-[indoline-3,2'-pyrrolidin]-2-one.

In the title compound, C(25)H(20)Cl(2)N(2)O(2), the pyrrolidine ring adopts an envelope conformation and the best plane through the five ring atoms makes a dihedral angle of 87.03 (8)° with the indoline ring. Mol-ecules are connected by pairs of N-H⋯O hydrogen bonds into centrosymmetric dimers with an R(2) (2)(8) graph-set ring motif. C-H⋯O hydrogen bonds stabilize the crystal structure.

3-(4-Bromo-phen-yl)quinazolin-4(3H)-one.

In the title compound, C(14)H(9)BrN(2)O, the quinazoline unit is essentially planar, with a mean deviation of 0.058 (2) Šfrom the least-squares plane defined by the ten constituent ring atoms. The dihedral angle between the mean plane of the quinazoline ring system and the 4-bromo-phenyl ring is 47.6 (1)°. In the crystal, mol-ecules are linked by inter-molecular C-H⋯N and C-H⋯O hydrogen bonds, forming infinite chains of alternating R(2) (2)(6) dimers and R(2) (2)(14) ring motifs.