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Close-up view of intermolecular NH and OH hydrogen bonding in the crystal structure of Boc-Py-β-COOH•0.5 dioxane. The Boc-amine-NH donates an H-bond to the carboxylic acid carbonyl of an adjacent molecule, while the amide carbonyl accepts H-bonds from the carboxylic acid OH group and amide NH of an adjacent molecule.
