1. Department of Chemistry Centre of Advanced Study Guru Nanak Dev University Amritsar 143005 India
2. Department of Chemistry Indian Institute of Technology Indore Simrol Khandwa Road Indore 453552 India
3. South African Medical Research Council Drug Discovery and Development Research Unit Department of Chemistry and Institute of Infectious Disease and Molecular Medicine University of Cape Town Rondebosch 701 7700 Cape Town South Africa
4. Department of Biosciences and Bio-Medical Engineering Indian Institute of Technology Indore Simrol Khandwa Road Indore 453552 India
5. Department of Metallurgy Engineering and Materials Science Indian Institute of Technology Indore Simrol Khandwa Road Indore 453552 India