... -beta,8-beta(2s*,4s*),8a-beta))-alph;butanoicacid,2,2-dimethyl-,1,2,3,7,8,8a-hexahydro-3,7-dimethyl-8 ... )-TETRAHYDRO-4-HYDROXY-6-OXO-2H-PYRAN-2-YL]ETHYL]-1-NAPHTHALENYLY-2,2-DIMETHYL BUTANOATE;2,2-DIMETHYL-BUTYRIC ACID (1S,3R,7S,8S ... .1%Simvastatin hydroxyacid< 0.4%Lovastatin and epilovastatin< 1.0% High Quality Simvastatin (CAS No.:79902-63-9)