1. 1) A part of this study vas read at the 5th Annual Meeting of the Chemical Society of Japan in Tokyo, on April 5, 1952.
2. 2) Part I: T. Nozoe, T. Mukai, and J. Minegishi: Proc. Japan Acad., 28, 287 (1952).
3. 3) T. Nozoe, T. Mukai, and J. Minegishi: Proc. Japan Acad., 27, 419 (1951).
4. 4) W. von E. Doering and. C. F. Hiskey: J. Am. Chem. Soc., 74, 5688 (1952).
5. 5) Microanalyses were carried out by Messrs. Hirai and Kawamoto of Sankyo Co., and Miss K. Kato of this laboratory.