1. Contribution from the Division of Organic Chemistry, National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya, Tokyo 158-8501, Japan; Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan; Research Laboratory, KOSÉ Corporation, 1-18-4 Azusawa, Itabashi, Tokyo 174-0051, Japan; and Application and Research Center, JEOL, 3-1-2 Musashino, Akishima, Tokyo 196-8558, Japan