1. Ryan, A. J., and Wright, S. E., J. Pharm. Pharmacol., 13, 1492 (1961).
2. Fierz-David, H. E., and Blangey, L., Fundamental Processes of Dye Chemistry, 128 (Interscience, New York, 1949).
3. Williams, R. T., Detoxication Mechanisms, 472 (Chapman and Hall, London, 1959).
4. Ryan, A. J., and Wright, S. E. (unpublished work).