**5. Acknowledgment**

We thank Dr. Thomas Netscher of DSM Nutritional Products, Ltd., for the donation of (-) actinol **18**. We also would like to thank Prof. H. A. Frank (University of Connecticut) with ultrafast experiments and Prof. H. Hashimoto (Osaka City University) with Stark spectra measurement. This work was supported by a Grant-in-Aid for Science Research on Priority Areas 16073222 from the Ministry of Education, Culture, Sports, Science and Technology, and Matching Fund Subsidy for a Private University, Japan. T. K. is also grateful for recieving the Scholar Ship of JSPS.
