1. Phytochemistry and Phytopharmacology Division, Jawaharlal Nehru Tropical Botanic Garden and Research Institute, Palode, Thiruvananthapuram 695 562, Kerala, India
2. Sophisticated Analytical Instrument Facility (SAIF), CSIR-Central Drug Research Institute, Lucknow-226031, India
3. National Institute for Interdisciplinary Science and Technology, Council of Scientific and Industrial Research, Thiruvananthapuram - 695 019, Kerala, India