1. Department of Industrial Chemistry; Faculty of Engineering; Tokyo University of Science, Kagurazaka, Shinjuku-ku; Tokyo 162-8601 Japan
2. Graduate School of Pharmaceutical Sciences; Hokkaido University; Sapporo 060-0812 Japan
3. Showa Pharmaceutical University, 3-3165 Higashi-Tamagawagakuen, Machida; Tokyo 194-8543 Japan
4. Department of Chemistry; Graduate School of Science; Tohoku University, Aoba-ku; Sendai 980-8578 Japan