1. Department of Chemical Science and Engineering School of Material and Chemical Technology; Tokyo Institute of Technology; 2-12-1-H101 Ookayama, Meguro Tokyo 152-8552 Japan
2. Laboratory for Immunopharmacology of Microbial Products, School of Pharmacy; Tokyo University of Pharmacy and Life Sciences; 1432-1 Horinouchi Hachioji Tokyo 192-0392 Japan