1. Department of Chemistry, University College of Science, Kolkata, India;
2. Department of Chemistry, Bidhannagar College, Kolkata, India;
3. Department of Botany, Krishnagar Government College, Krishnanagar, India;
4. Molecular and Applied Mycology and Plant Pathology Laboratory, Centre of Advanced Study, Department of Botany, University of Calcutta, Kolkata, India