The molecule is a dipeptide obtained by formal condensation of the carboxy group of L-tryptophan with the amino group of L-threonine. It derives from a L-tryptophan and a L-threonine.
(2S,3R)-2-[[(2S)-2-amino-3-(1H-indol-3-yl)propanoyl]amino]-3-hydroxybutanoic acid