The molecule is a glutamyl-L-amino acid obtained by formal condensation of the gamma-carboxy group of glutamic acid with the amino group of tryptophan. It is a conjugate acid of a gamma-Glu-Trp(1-).
(2S)-2-amino-5-[[(1S)-1-carboxy-2-(1H-indol-3-yl)ethyl]amino]-5-oxopentanoic acid