1. Department of Chemistry National Institute of Technology Manipur Langol, Imphal 795004, Manipur India
2. Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research (NIPER) Kolkata, Chunilal Bhawan, 168, Maniktala Main Road, Kolkata 700054 India
3. Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas New Delhi 110016 India