Chemical Name: (6R,7R)-7-((R)-2-amino-2-(4-((ethoxycarbonyl)oxy)phenyl)acetamido)-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid (as per USP)
Synonym: Atorvastatin Cyclic Isopropyl Impurity ; Atorvastatin FXA Impurity
Smile: O=C1[C@@H](NC([C@H](N)C2=CC=C(OC(OCC)=O)C=C2)=O)[C@@]3([H])SCC(C)=C(C(O)=O)N31