1. Department of Pharmaceutical Chemistry, Kyoto Pharmaceutical University, Yamashina-ku, Kyoto 607-8414, Japan
2. Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
3. Chemistry Department, Faculty of Science, South Valley University, Qena 83523, Egypt
4. Faculty of Pure and Applied Sciences, University of Tsukuba, Tenodai 1-1-1, Tsukuba, Ibaraki 307-8571, Japan