1. Department of Pharmacy; University of Rajshahi; Rajshahi 6205 Bangladesh
2. Department of Genetic Engineering and Biotechnology; University of Rajshahi; Rajshahi 6205 Bangladesh
3. Department of Applied Chemistry, Faculty of Engineering; University of Toyama; 3190 Gofuku Toyama 930-8555 Japan
4. Department of Chemical and Pharmaceutical Sciences; Via L. Giorgieri 1 34127 Trieste Italy
5. Department of Chemistry; Rajshahi University of Engineering & Technology; Rajshahi 6204 Bangladesh