The molecule is an N(2)-acyl-L-glutaminate resulting from the deprotonation of the carboxy group of N(2)-[4-(indol-3-yl)butanoyl]-L-glutamine. The major species at pH 7.3. It is a conjugate base of a N(2)-[4-(indol-3-yl)butanoyl]-L-glutamine.
(2S)-5-amino-2-[4-(1H-indol-3-yl)butanoylamino]-5-oxopentanoate