Cefprozil Monohydrate EP Impurity I

Chemical Name: (2R)-2-[(2R)-2-amino-2-(4-hydroxyphenyl)acetyl]amino-2-[(2R)-4-carboxy-5-[(1E)-prop-1-enyl]-3,6-dihydro-2H-1,3-thiazin-2-yl]-acetic acid (as per EP); (R)-2-{(R)-[(R)-2-Amino-2-(4-hydroxyphenyl)acetamido](carboxy)methyl}-5-[(E)-prop-1-enyl]-3,6-dihydro-2H-1,3-thiazine-4-carboxylic acid (as per USP)