The molecule is a polypeptide in which the epsilon-amino group of each L-lysine residue in poly-L-lysine is substituted with a benzylpenicilloyl group. It derives from a poly(L-lysine) macromolecule.
(2R,4S)-2-[2-[[(5R)-5-amino-5-carboxypentyl]amino]-2-oxo-1-[(2-phenylacetyl)amino]ethyl]-5,5-dimethyl-1,3-thiazolidine-4-carboxylic acid