1. Department of Chemistry, Faculty of Science, Okayama University, Tsushima-naka 3-1-1, Okayama 700-8530, Japan, Research Institute of Natural Sciences, Okayama University of Science, Ridai-cho, Okayama 700-0005, Japan, Facolta di Farmacià, Universita degli Studi “G. D’Annunzio”, I-66100 Chieti, Italy, Department of Chemistry, Faculty of Science, Kumamoto University, Kumamoto 860-8555, Japan, and Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland