Chattopadhyay, K. K., and D. P. Chakraborty. “Claptaphylline - A New Furoquinoline Alkaloid from Clausena Heptaphylla Wt And Arn”. Indian Science Cruiser, vol. 6, no. 1, Jan. 1992, pp. 29-30, http://www.informaticsjournals.com/index.php/ISC/article/view/42765.