1. Division of Chemical Biology, Rajiv Gandhi Centre for Biotechnology, Jagathy, Trivandrum 695 014, Kerala, India
2. Department of Chemistry, University of Kerala, Kariavattom, Trivandrum 695 581, Kerala, India
3. Biophotonics and Imaging Laboratory, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum 695 012, Kerala, India