ACKNOWLEDGMENT
We thank Mr. Kenji Haraguchi, Mrs. Yasuko Kimura, and Mr.Kazuji Kinoshita of Kyoto Prefectural Tea Industry Research Institute for providing fresh tea leaves and Mr. Tsuyoshi Fujita,Dr. Miki Hisada, and Dr. Katsuyoshi Masuda of the Suntory Institute for Bioorganic Research for performing the MS spectroscopy analysis.