1. 1) Gist of the present studies was read as a paper at the 7th Annual Meeting of the Chemical Society of Japan in Tokyo, April 1, 1954. Detailed report will be published in the forthcoming Science Reports of the Tohoku University.
2. 2) The expenses for the present studies were defrayed by the Grnat in Aid for Fundamental Scientific Research from the Ministry of Education. Samples of Colchicine used for this work were kindly supplied by the Fujisawa Pharmaceutical Industries, Ltd., to whom the workers extend their deep gratitude.
3. 3) M. J. S. Dewar: Nature, 155, 141, 479 (1945).
4. T. Nozoe, M. Sato, and K. Matsui: J. Chem. Soc. Japan, 73, 848 (1952);
5. Proc. Japan Acad., 28, 410 (1952);