SMILES: CC(=CCC1=C2C(=CC=C1)NC=C2C[C@@H](C(=O)[O-])[NH3+])C
Description: The molecule is an amino acid zwitterion arising from transfer of a proton from the carboxy to the amino group of 4-(3-methylbut-2-enyl)-L-tryptophan; major species at pH 7.3. It is a tautomer of a 4-(3-methylbut-2-enyl)-L-tryptophan.