1. Department of Chemistry, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur 522510, AP, India
2. Department of Chemistry, Faculty of sciences, Acharya Nagarjuna University, P.O. Box: 522510, Guntur, India
3. Chemical Research and Development, Aurobindo Pharma Ltd., Sangareddy (M), Medak District 502329, Telangana, India