1. Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S. A. S. Nagar, Punjab 160062, India
2. University Center for Research and Development, Chandigarh University, Gharuan, Punjab 140413, India
3. Department of Chemistry, Panjab University, Chandigarh 160014, India
4. Bioorganische Chemie, Institut für Chemie, Universität Hohenheim, Garbenstraße 30, D-70599 Stuttgart, Germany