Cefprozil EP Impurity D Potassium salt

Chemical Name: (6R,7R)-7-amino-8-oxo-3-[(1Z)-prop-1-enyl]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid Potassium salt (as per EP); 7-Amino-3-propenylcephalosporanic acid (Z-isomer) Potassium salt (as per USP) ; (6R,7R)-7-Amino-8-oxo-3-[(Z)-prop-1-enyl]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid Potassium salt (as per USP)

Synonym: benzyl (R)-2-(5-ethyl-1H-indole-3-carbonyl)pyrrolidine-1-carboxylate