Chemical Name: (3R,5R)-7-[(1S,2S,6R,8S,8aR)-8-(2,2-dimethylbutanoyloxy)-2,6-dimethyl-1,2,6,7,8,8a-hexahydronaphthalen-1-yl]-3,5-dihydroxyheptanoic acid
Synonym: Simvastatin acid;Simvastatin EP Impurity A
Smile: O=C(O)C[C@H](O)C[C@H](O)CC[C@H]1[C@@H](C)C=CC2=C[C@H](C)C[C@H](OC(C(C)(C)CC)=O)[C@]12[H]