1. See a recent review byMothes, K.: Symp. Soc. Exp. Biol.13, 258 (1959).
2. Wada, E., T. Kisaki andM. Ihida: Arch. Biochem. Biophys.80, 258 (1959).
3. Wada, E., T. Kisaki andM. Ihida: Since the specific rotation ofl-nornicotine was lowered in certain solvents, the rotation of an authenticl-nornicotine of the corresponding solvent and concentration was measured as a check.
4. Wada, E., T. Kisaki andM. Ihida: Unpublished data.
5. Späth, E., C. S. Hicks andE. Zajic: Chem. Ber.68, 1388 (1935).