Cefazolin EP Impurity D ;

(6R,7R)-3-[(Acetyloxy)methyl]-8-oxo-7-[(1H-tetrazol-1-ylacetyl)amino]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid sodium salt ;

C13H13N6NaO6S ;

MW: 404.33 ;