1. Brown, B. T., Ranger, D., and Wright, S. E., J. Pharmacol., 113, 353 (1955).
2. Brown, B. T., and Wright, S. E., J. Biol. Chem., 220, 431 (1956).
3. Kayser, F., Chim. Ber., 88, 556 (1955).
4. Wright, S. E., and Gisvold, O., J. Amer. Pharm. Assoc., Sci. Ed. (in the press).
5. Tschesche, R., Grimmer, and Seehofer, Chim. Ber., 86, 1235 (1953).