1. 1) (a) Nozoe: Science of Drugs, 3,171(1949).
2. (b) Nozoe, et al.: To be published.
3. 2) Nozoe: The Proceedings, 26 (No. 9) 30 (1950).
4. 3) Dewar: Nature, 155, 141, 479 (1945). Dewar seems to be considering some ionic structures for colchicine. (Cf. Scott, Tarbell: J. Am. Chem. Soc., 72, 240 (1950). The present authors have not been able to see the original works of Dewar's.)
5. 4) Barltrop and Nicholson: J. Chem. Soc., 1948, 116; Birkinshaw, Chambers, Raistrick: Biochem. J., 36, 242 (1942).