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Almansour, Abdulrahman I., Raju Suresh Kumar, Natarajan Arumugam, S. Kanagalaksmi, und J. Suresh. 5-Chloro­spiro­[indoline-3,7′-6H,7H,8H-pyrano[3,2-c: 5,6-c′]di[1]benzopyran]-2,6′,8′-trione. International Union of Crystallography, 2012.

Almansour, Abdulrahman I., et al. 5-Chloro­spiro­[indoline-3,7′-6H,7H,8H-pyrano[3,2-c: 5,6-c′]di[1]benzopyran]-2,6′,8′-trione. International Union of Crystallography, 2012.