SMILES: C1=CC2=C(C(=C1)O)C(=CN2)C[C@@H](C(=O)O)N
Description: The molecule is an optically active form of 4-hydroxytryptophan having L-configuration. It is a 4-hydroxytryptophan, a L-tryptophan derivative and a non-proteinogenic L-alpha-amino acid.