The molecule is a tripeptide consisting of L-glutamic acid, glycine and L-phenylalanine residues joined in sequence. It derives from a L-glutamic acid and a L-phenylalanine.
(4S)-4-amino-5-[[2-[[(1S)-1-carboxy-2-phenylethyl]amino]-2-oxoethyl]amino]-5-oxopentanoic acid