1. Department of Chemistry, Dolphin Institute of Biomedical and Natural Sciences, Dehradun, Uttarakhand, India
2. Uttarakhand Technical University, Dehradun, Uttarakhand, India
3. Department of Chemistry, Dr. S.N. Nautiyal Government, P.G. College Karanprayag, Uttarakhand, India
4. Department of Chemistry, G.I.C. Boora, Chamoli Garhwal, Uttarakhand, India
5. Department of Chemistry, H.N.B. Garhwal University, Srinagar Garhwal, Uttarakhand, India