Synonyms: Eplerenone EP Impurity D,Pregn-4-ene-7,21-dicarboxylic acid, 9,11-epoxy-17-hydroxy-3-oxo-, γ-lactone, (7α,11α,17α)-, (7α,11α,17α)-9,11-Epoxy-17-hydroxy-3-oxo-pregn-4-ene-7,21-dicarboxylic acid γ-lactone, 9,11α-Epoxy-7α-carboxy-3-oxo-17α-pregn-4-ene-21,17-carbolactone, 7α-Carboxy-9,11α-epoxy-3-oxo-17α-pregn-4-ene-21,17-carbolactone, (2’R)-9,11α-Epoxy-3,5′-dioxo-4′,5′-dihydro-3’H-spiro[androst-4-ene-17,2′-furan]-7α-carboxylic acid, O-Demethyleplerenone, 9,11-Epoxy-17-hydroxy-3-oxo-pregn-4-ene-7,21-dicarboxylic Acid gamma-Lactone
