1. Department of Chemistry, Karnatak University, Dharwad-580 003, India
2. Department of Chemistry, Ballari Institute of Technology and Management, Ballari-583 104, India
3. Department of P.G. Studies in Chemistry, Veerashaiva College, Ballari-583104, India
4. Department of Pharmaceutical Chemistry, SET's College of Pharmacy, Dharwad-580 002, India