SMILES: C1=C(NC(=N1)CC[C@@H](C(=O)[O-])[NH3+])C[C@@H](C(=O)[O-])[NH3+]
Description: The molecule is a 2-(3-amino-3-carboxypropyl)-L-histidine dizwitterion arising from transfer of two protons from the carboxy to the amino groups of 2-[(3S)-3-amino-3-carboxypropyl]-L-histidine. It is a tautomer of a 2-[(3S)-3-amino-3-carboxypropyl]-L-histidine.