SMILES: C1C[C@H](N(C1)C(=O)[C@H](CC2=CN=CN2)[NH3+])C(=O)[O-]
Description: The molecule is a dipeptide zwitterion obtained by transfer of a proton from the carboxy to the amino terminus of His-Pro. Major species at pH 7.3. It is a tautomer of a His-Pro.