Cefadroxil EP Impurity D

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

Synonym: Atorvastatin Lactam Lactone

Smile: O=C(C(N12)=C(C)CS[C@]2([H])[C@H](NC([C@@H](N)C3=CC=C(O)C=C3)=O)C1=O)O