1. Department of Chemistry, R.D.S. College, B.R.A, Bihar University, Muzaffarpur, Bihar, India
2. Department of Chemistry, Bioorganic Laboratory, University of Delhi, Delhi, India
3. Department of Chemistry, Daulat Ram College, University of Delhi, Delhi, India
4. Department of Chemistry, Motilal Nehru College, University of Delhi, Delhi, India
5. P.G. Department of Chemistry, Jai Prakash University, Chapra, India