1. Phytochemistry and Phytopharmacology Division, Jawaharlal Nehru Tropical Botanic Garden and Research Institute, Palode, Thiruvananthapuram 695 562, Kerala, India
2. Organic Chemistry Section, CSIR–National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695 019, Kerala, India
3. Amity Institute for Herbal and Biotech Products Development, Peroorkada, Thiruvananthapuram 695 005, Kerala, India