1. Phytochemistry and Phytopharmacology Division, Jawaharlal Nehru Tropical Botanic Garden and Research Institute, Pacha-Palode 695 562, Thiruvananthapuram, Kerala, India
2. Department of Botany, University of Kerala, Kariavattom 695 034, Thiruvananthapuram, Kerala, India
3. Garden Management Division, Jawaharlal Nehru Tropical Botanic Garden and Research Institute, Pacha-Palode 695 562, Thiruvananthapuram, Kerala, India