The molecule is an L-lysine derivative obtained from nucleophilic cleavage of the beta-lactam ring of benzylpenicillin (penicillin G) by the epsilon-amino group of the L-lysine molecule. It contains a benzylpenicilloyl group. It derives from a benzylpenicillin.
(2R,4S)-2-[(1R)-2-[[(5S)-5-amino-5-carboxypentyl]amino]-2-oxo-1-[(2-phenylacetyl)amino]ethyl]-5,5-dimethyl-1,3-thiazolidine-4-carboxylic acid