SMILES: C(C[C@@H](C(=O)[O-])[NH2+]CCC(=O)[O-])C[NH+]=C(N)N
Description: The molecule is an amino acid zwitterion obtained from N(2)-(2-carboxyethyl)-L-arginine by the removal of a proton for both of the carboxy groups and the addition of a proton to the alpha-amino group and to the guanidyl group. It is a tautomer of a N(2)-(2-carboxyethyl)-L-arginine.