The molecule is an oligopeptide comprising five D-glutamic acid residues linked by peptidic bonds between the amino and gamma-carboxy groups. It derives from a D-glutamic acid.
(2R)-2-[[(4R)-4-[[(4R)-4-[[(4R)-4-[[(4R)-4-amino-4-carboxybutanoyl]amino]-4-carboxybutanoyl]amino]-4-carboxybutanoyl]amino]-4-carboxybutanoyl]amino]pentanedioic acid