Atorvastatin EP Impurity K

Chemical Name: methyl (3R,5R)-7-[2-(4-fluorophenyl)-3-phenyl-4-(phenylcarbamoyl)-5-(propan-2-yl)-1H-pyrrol-1-yl]-3,5-dihydroxyheptanoate (as per EP); methyl (3R,5R)-7-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)-3,5-dihydroxyheptanoate (as per USP)

Synonym:  Atorvastatin Methyl Ester (USP)

Smile: O=C(OC)C[C@H](O)C[C@H](O)CCN1C(C2=CC=C(F)C=C2)=C(C3=CC=CC=C3)C(C(NC4=CC=CC=C4)=O)=C1C(C)C