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In the title compound, C 27 H 15 NO 6 ·0.5CHCl 3 , the central pyran ring and both the benzopyran systems are planar, with the dihedral angle between the outer rings being 3.24 (6)°. The indolin-2-one system is in a perpendicular configuration with respect to the pyran ring [dihedral angle = 87.58 (2)°]. Supra­molecular layers in the  ac  plane are formed in the crystal structure whereby inversion-related mol­ecules are connected by N—H⋯O hydrogen bonds. These are further linked by C—H⋯O inter­actions, forming a supra­molecular layer in the  ac  plane. Disordered CHCl 3  solvent in the structure was modelled with the SQUEEZE routine in  PLATON  [Spek (2009  ▶ ).  Acta Cryst.  D 65 , 148–155].

5-Methylspiro[indoline-3,7′-[6H,7H,8H]pyrano[3,2-c:5,6-c′]di[1]benzopyran]-2,6′,8′-trione chloroform hemisolvate