The molecule is a tripeptide composed of two L-glutamic acid and one L-arginine residues joined in sequence. It derives from a L-glutamic acid and a L-arginine.
(4S)-4-amino-5-[[(2S)-4-carboxy-1-[[(1S)-1-carboxy-4-(diaminomethylideneamino)butyl]amino]-1-oxobutan-2-yl]amino]-5-oxopentanoic acid