Cefprozil EP Impurity B Sulfate salt

Chemical Name: (6R,7R)-7-[[(2R)-2-amino-2-(4-hydroxyphenyl)acetyl]amino]-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid Sulfate salt (as per EP)

Smile: OC1=CC=C([C@@]([H])(N)C(N[C@@]2([H])[C@](SCC(C)=C3C(O)=O)([H])N3C2=O)=O)C=C1.O=[S](O)(O)=O