Synonyms: Atorvastatin Calcium Trihydrate Imp. H (EP), Atorvastatin Imp. H (EP), Atorvastatin USP Related Compound H, Atorvastatin USP RC H, (4R,6R)-6-[2-[2-(4-Fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl]ethyl]-4-hydroxytetrahydro-2H-pyran-2-one, Atorvastatin Lactone, Atorvastatin Related Compound H, Atorvastatin Calcium Trihydrate Impurity H, Atorvastatin Impurity H