1. Department of Chemistry, Chittagong University of Engineering & Technology, Chittagong 4349, Bangladesh.
2. H.E.J. Research Institute of Chemistry, ICCBS, University of Karachi, Karachi 75270, Pakistan
3. Nional Center for Natural Products Research, School of Pharmacy, University of Mississippi, Mississippi, USA
4. Department of Chemistry, University of Rajshahi, Rajshahi 6205, Bangladesh