(S)-N-(1H-Indole-3-acetyl)tryptophan-d4

(S)-N-(1H-Indole-3-acetyl)tryptophan-d4 is deuterium labeled (S)-N-(1H-Indole-3-acetyl)tryptophan. (S)-N-(1H-Indole-3-acetyl)tryptophan (compound 4a) is a Tryptophan derivative that weakly inhibits β-D-glucosidase.