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A number of protected proline-containing dipeptides Boc-Xaa-Pro-OBu(t) were converted via epimerization-free oxidation with RuO4 to dipeptides with an internal pyroglutamic acid residue,(More)
1. The NMR spectra of cyclohexapeptides constructed of L(D)-alanine and glycine residues have been studied in (CD3)2SO, CF3COOH, and H2O solutions. 2. In all the compounds studied, the amide bonds(More)