1. 1) A part of this report was presented at the 5th Annual General Meeting of the Chemical Society of Japan in Tokyo, April 5, 1952.
2. 2) T. Nozoe, T. Mukai, and J. Minegishi: Proc. Japan Acad., 27, 419 (1951).
3. 3) T. Nozoe, S. Seto, and S. Ito: To be published. Cf. W. von E. Doering and L. H. Knox: J. Am. Chem. Soc., 73, 828 (1951).
4. 4) T. Nozoe, T. Mukai, and I. Murata: Proc. Japan Acad., 28, 142 (1952).
5. 5) Microanalyses were carried out by Miss K. Kato of this laboratory, and by Messrs. Hirai and Kawamoto of the Sankyo Co., Ltd. (Tokyo).