1. Alagesaboopathi, Balu, S., 1996. Phytochemical observation on some species of Andrographis Wall. Ancient Science of Life, vol. XV, pp. 293–295
2. Harborne, J.B., 1973. Phytochemical Methods. Chapman and Hall, London
3. Prabhakaran, P., 1996. Chemical investigation of Indian medical plants and related synthetic studies. Ph.D. Thesis, Madurai Kamaraj University, Madurai, India
4. Phytochemical screening of some plants of Manipur I;Shuchita;J Eco Bot Phytochem,1990