1. Department of Chemistry; Faculty of Science; Jamia Hamdard (Hamdard University); New Delhi 110 062 India
2. Department of Pharmaceutical Chemistry; Faculty of Pharmacy; Jamia Hamdard (Hamdard University); New Delhi 110 062 India
3. CSIR Unit for Research and Development of Information Products; Pune 411038 India
4. Department of Chemistry; Faculty of Science; Delhi University; New Delhi India