Cefprozil EP Impurity B Sodium 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 Sodium salt (as per EP)

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