1. Bioorganic LaboratoryDepartment of ChemistryUniversity of Delhi Delhi 110007 India
2. Department of ChemistryR.D.S. CollegeB.R.A. Bihar University Muzaffarpur 842002 India
3. Department of ChemistrySt. Stephen's CollegeUniversity of Delhi Delhi 110007 India
4. Department of ChemistryKirori Mal CollegeUniversity of Delhi Delhi 110007 India