SMILES: C(C[C@@H](C(=O)[O-])NC(=O)C[C@@H](C(=O)[O-])[NH3+])C[NH+]=C(N)N
Description: The molecule is a dipeptide zwitterion obtained by transfer of two protons from the carboxy to the amino and guanidino groups of beta-Asp-Arg; major species at pH 7.3. It is a tautomer of a beta-Asp-Arg.