1. Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110007, India
2. Department of Chemistry, Kirori Mal College, University of Delhi, Delhi-110007, India
3. Department of Chemistry, R.D.S College, B.R.A. Bihar University, Muzaffarpur-842002, India
4. Department of Chemistry, Deshbandhu College, University of Delhi, Delhi-110019, India