Atorvastatin EP Impurity A (Calcium salt)

Chemical Name: (3R,5R)-7-[2,3-diphenyl-4-(phenylcarbamoyl)-5-(propan-2-yl)-1H-pyrrol-1-yl]-3,5-dihydroxyheptanoic acid Calcium salt (as per EP)

Synonym: Defluoro Atorvastatin Calcium Salt;Atorvastatin USP Related Compound A

Smile: O=C([O-])C[C@H](O)C[C@H](O)CCN1C(C2=CC=CC=C2)=C(C3=CC=CC=C3)C(C(NC4=CC=CC=C4)=O)=C1C(C)C.[1/2Ca+]