Cefazolin EP Impurity D Potassium salt

Chemical Name: (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 Potassium salt (as per EP); (6R,7R)-7-[2-(1H-Tetrazol-1-yl)acetamido]-3-(acetoxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid Potassium salt (as per USP)

Smile: O=C(C(N12)=C(COC(C)=O)CS[C@]2([H])[C@H](NC(CN3N=NN=C3)=O)C1=O)O.[K]