1. Division of Chemistry and Biotechnology, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
2. Swiss Tropical and Public Health Institute, Socinstrasse 57, CH-4002 Basel, Switzerland
3. University Basel, Petersplatz 1, CH-4003 Basel, Switzerland
4. Chemistry Department, Faculty of Science, El Menoufeia University, Shebin El Koom, Egypt