1. Portions of this work were reported in preliminary form: (a) Jensen, K. J.; Songster, M. F.; Vágner, J.; Alsina, J.; Albericio, F.; Barany, G. InPeptidesChemistry, Structure and Biology: Proceedings of the FourteenthAmerican Peptide Symposium, Columbus, OH, June 18−23, 1995; Kaumaya, P. T. P., Hodges, R. S., Eds.; Mayflower Scientific: Kingswinford, U.K., 1996; pp 30−32. (b) Jensen, K. J.; Songster, M. F.; Vágner, J.; Alsina, J.; Albericio, F.; Barany, G. InInnovation and Perspectives in Solid PhaseSynthesis & Combinatorial Libraries, 1996, Collected Papers,Fourth International Symposium, Edinburgh, Scotland, September 12−16, 1995; Epton, R., Ed.; Mayflower Scientific: Kingswinford, U.K., 1997; pp 187−190.