The molecule is a cephalosporin having an acetoxy group at the 3-position and a 5-carboxy-5-oxopentanamido group at the 7-position. It is a conjugate acid of a (7R)-7-(5-carboxy-5-oxopentanamido)cephalosporanate(2-).
(6R,7R)-3-(acetyloxymethyl)-7-[(5-carboxy-5-oxopentanoyl)amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid