... Issue. Helvetica Chimica Acta. Volume 81, Issue 12, pages 2218–2243, December 16, 1998. Additional Information. How to Cite. Seebach, D., Abele, S., Sifferlen, T., Hänggi, M., Gruner, S. and Seiler, P. (1998), Preparation and Structure of β-Peptides Consisting of Geminally ...