1. Faculty of Integrated Arts and Sciences, Hiroshima University, 1-7-1, Kagamiyama, Higashi-hiroshima 739-8521, Japan (T.N.); Department of Chemistry, Columbia University, New York, New York 10027 (K.T., G.P., N.B.); and JASCO Corporation, 2967-5, Ishikawa, Hachioji, Tokyo 192-8537, Japan (T.T., C.O., H.M., A.W.)