Synonyms: [4S-[4a,4ab,5b(2S*,4S*),6b]]-4(2,2-Dimethyl-1-oxobutoxy)-3,4,4a,5,6,7-hexahydro-6-methyl-5-[2-(tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl)ethyl]-2-naphthalenecarboxylic Acid;6Carboxy Simvastatin;([4S-[4 ,4a ,5 (2S*,4S*),6 ]]-4(2,2-Dimethyl-1-oxobutoxy)-3,4,4a,5,6,7-hexahydro-6-methyl-5-[2-(tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl)ethyl]-2-naphthalenecarboxylic Acid);[4S-[4a,4a,5(2S*,4S*),6]]-4(2,2-Dimethyl-1-oxobutoxy)-3,4,4a,5,6,7-hexahydro-6-methyl-5-[2-(tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl)ethyl]-2-naphthalenecarboxylic Acid