1. Department of Organic and Medicinal Chemistry; CSIR-Indian Institute of Chemical Biology; 4 Raja S. C. Mullick Road Kolkata 700032 WB India
2. Department of Biophysics; Bose Institute; P-1/12 CIT Scheme VIIM Kolkata 700054 India
3. Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III SaltLake; Kolkata 700 098 India