CAS No.: 139893-43-9 Synonyms: (β R ,δ R ,1 S ,2 S ,6 R ,8 S ,8a R )-8-(2,2-Dimethyl-1-oxobutoxy)-1,2,6,7,8,8a-hexahydro-β,δ-dihydroxy-2,6-dimethyl-1-naphthaleneheptanoic acid ammonium salt; Simvastatin acid ammonium salt; Simvastatin carboxylic acid ammonium salt;…