Eplerenone Impurity 1

Chemical Name: Methyl (4aS,4bR,5aR,6aS,7S,10S,11R)-11-hydroxy-4a,6a-dimethyl-2,4'-dioxo-2,4,4a,5a,6,6a,8,9,9a,9b,10,11-dodecahydro-3H-spiro[cyclopenta[1,2]phenanthro[4,4a-b]oxirene-7,2'-[1,3]dioxolane]-10-carboxylate

Smile: O=C1C=C([C@H](O)[C@H]2C(OC)=O)[C@@](CC1)(C)[C@]34C2C(CC[C@@]56OCC(O6)=O)[C@]5(C)C[C@H]3O4