1. 1) Present address: Department of Chemistry, Bowmann Oddy Laboratories, The University of Toledo, 2801, W. Bancroft Street, MS 602, Toledo, OH 43606, U.S.A.
2. 3) Jerom B. R., Spencer K. H., Eur. Pat. Appl. EP 277794 (1988).
3. 5) Bochringer C. F., Shochne G. M. B. H., Brit. Pat. Appl. BP 866488 (1961).