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Epi Lovastatin Lovastatin epi-Isomer Simvastatin EP Impurity Simvastatin EP Impurity F Simvastatin Impurity 6（EP-F） Epilovastatin, 10 - 15% isoMers (1S,3R,7S,8S,8aR)-8-[2-[(2R,4R)-4-H Epilovastatin, 95%, 10 - 15% isomers Simvastatin EP Impurity F (epi-Lovastatin) Simvastatin Impurity 6(Simvastatin EP Impurity F) Simvastatin EP Impurity F/ Simvastatin Related Compound F (epi-Lovastatin/ Lovastatin epimer) (R)-(1S,3R,7S,8S,8aR)-8-(2-((2R,4R)-4-hydroxy-6-oxotetrahydro-2H-pyran-2-yl)ethyl)-3,7-dimethyl-1,2,3,7,8,8a-hexahydronaphthalen-1-yl 2-methylbutanoate (1S,3R,7S,8S,8aR)-8-[2-[(2R,4R)-4-Hydroxy-6-oxotetrahydro-2H-pyran-2-yl]ethyl]-3,7-dimethyl-1,2,3,7,8,8a-hexahydronaphthalen-1-yl (2R)-2-methylbutanoate (2R)-2-Methylbutanoic acid (1S,3R,7S,8S,8aR)-1,2,3,7,8,8a-hexahydro-3,7-dimethyl-8-[2-[(2R,4R)-tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl]ethyl]-1-naphthalenyl ester Butanoic acid, 2-methyl-, (1S,3R,7S,8S,8aR)-1,2,3,7,8,8a-hexahydro-3,7-dimethyl-8-[2-[(2R,4R)-tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl]ethyl]-1-naphthalenyl ester, (2R)- Simvastatin EP Impurity F (epi-Lovastatin)/(2R)-2-Methylbutanoic Acid (1S,3R,7S,8S,8aR)-1,2,3,7,8,8a-Hexahydro-3,7-dimethyl-8-[2-[(2R,4R)-tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl]ethyl]-1-naphthalenyl