Ac[sub 10]c: a medium-ring, cycloaliphatic C[sup α,α]-disubstituted glycine. Incorporation into model peptides and preferred conformation. - Moretto, A.; Formaggio, F.; Crisma, M.; Toniolo, C.; Saviano, M.; Benedetti, E.; Iacovino, R.; Vitale, R.M. (Journal of Peptide Research, 2001)