1. The correct way to represent the absolute configuration ofl-muscarine [E. Hardegger andF. Lohse, Helv. chim. Acta40, 2383 (1957] is shown in I which pictures it as N-[1,3,6-trideoxy-2,5-anhydro-l-ribo-hexityl]-N-trimethylammonium halide. The Rosanov carbon is C(5) and has the LG-configuration.
2. C. H. Eugster, F. Häfliger, R. Denss, andE. Girod, Helv. chim. Acta41, 205, 583, 705 (1958); Helv. chim. Acta42 (1959), in press.
3. We are greatly indebted to Dr.F. Häfliger, J. R. Geigy, Basle, for placing these compounds at our disposal.
4. S. L. Friess, A. A. Patchett, andB. Witkop, J. Amer. chem. Soc.79, 459 (1957).
5. I. B. Wilson, J. biol. Chem.197, 215 (1952).