1. Department of Chemistry, Acharya Nagarjuna University, Guntur, Andhra Pradesh, India
2. Department of Chemistry, Government College for Women (A), Guntur, Andhra Pradesh, India
3. Centre for Mass Spectrometry, Analytical and Structural Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana, India
4. Sri A.S.N.M. Government College (Autonomous), Palakol, Andhra Pradesh, India