1. Long, A.A.W., Nayler, J.H.C., Smith, H., Taylor, T., and Ward N., J. Chem. Soc. (C) 1920(1971).
2. Long, A.A.W., and Nayler, J.H.C., U.S. Patent 3, 674, 776(1972).
3. Code Federal Regulations Title 21, 440.3 and 436.203(1976).
4. Toome, V., Hoffmann-La Roche Inc., Private Communication.
5. Waysek, E., Hoffmann-La Roche Inc., Private Communication.