The molecule is the monocarboxylic acid anion formed by deprotonating cefuzonam at the carboxyl oxygen. It is a conjugate base of a cefuzonam.
(6R,7R)-7-[[(2Z)-2-(2-amino-1,3-thiazol-4-yl)-2-methoxyiminoacetyl]amino]-8-oxo-3-(thiadiazol-5-ylsulfanylmethyl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate