1. Department of PG Studies and Research in Chemistry, School of Chemical Sciences, Jnana Sahyadri, Kuvempu University, Shankaraghatta, Shimoga, Karnataka, India;
2. Department of Chemistry and Biochemistry, School of Biological and Physical Sciences, Moi University, Eldoret, Kenya;
3. Department of Chemistry, Sri Venkateswara College, Dhula Kuan, New Delhi, India