The peptide (Z)‐Pro–Leuol

The structure of the synthetic protected dipeptide (Z)‐Pro–Leuol [systematic name: benzyl 2‐(1‐hydroxy­methyl‐3‐methyl­butyl­amino­carbonyl)­pyrrolidine‐1‐carboxyl­ate], C₁₉H₂₈N₂O₄, was determined by X‐ray crystallography. The peptide adopts a novel backbone conformation compared with other longer oligopeptides containing Pro–Leuol.