SMILES: C(CC[NH2+]CC[C@@H](C(=O)[O-])[NH3+])C[NH3+]
Description: The molecule is the alpha-amino-acid cation formed from carboxyspermidine by zwitterion formation between the carboxy and alpha-amino groups and protonation of the nitrogen atoms at positions 5 and 10; the major structure of carboxyspermidine at pH 7.3. It is a conjugate acid of a carboxyspermidine.