Synonyms: L-Tryptophan, (-)-Tryptophan, (2S)-2-Amino-3-(1H-indol-3-yl)propanoic acid, (S)-Tryptophan, 1H-Indole-3-alanine, (S)-, 2-Amino-3-indolylpropanoic acid, 3-Indol-3-ylalanine, EH 121, L-(-)-Tryptophan, 3-(1H-Indol-3-yl)-L-alanine, L-Tryptophane, Lyphan, NSC 13119, Secretory peptide (human clone HCQCJ56 precursor), Tryptophan, Tryptophane, h-Trp-oh, (S)-α-Amino-β-indolepropionic acid, (S)-α-Amino-1H-indole-3-propanoic acid, (S)-α-Aminoindole-3-propionic acid, 1H-Indole-3-propanoic acid, α-amino-, (S)-, l-α-Aminoindole-3-propionic acid, l-β-3-Indolylalanine