Similar names: (2'R)-3',4'-Dihydro-5'H-spiro[androst-4,6-diene-17,2'-furan]-3,5'-dione; Spironolactone Imp. F (EP); Pregna-4,6-diene-21-carboxylic acid, 17-hydroxy-3-oxo-, γ-lactone, (17α)-; 17α-Pregna-4,6-diene-21-carboxylic acid, 17-hydroxy-3-oxo-, γ-lactone (6CI,7CI,8CI); Spiro[17H-cyclopenta[a]phenanthrene-17,2'(5'H)-furan], pregna-4,6-diene-21-carboxylic acid deriv.; 11614 R.P.; 17-Hydroxy-3-oxo-17α-pregna-4,6-diene-21-carboxylic acid lactone; 17-Hydroxy-3-oxo-17α-pregna-4,6-diene-21-carboxylic acid γ-lactone; 17α-(2-Carboxyethyl)-17β-hydroxyandrosta-4,6-dien-3-one lactone; 17β-Hydroxy-3-oxopregna-4,6-diene-21-carboxylic acid; 20-Spiroxa-4,6-diene-3,21-dione; 3-(17β-Hydroxy-3-oxoandrosta-4,6-dien-17α-yl)propionic acid lactone; 3-(17β-Hydroxy-3-oxoandrosta-4,6-dien-17α-yl)propionic acid γ-lactone; 3-(3-Oxo-17β-hydroxy-4,6-androstadien-17α-yl)propionic acid γ-lactone; 3'-(3-Oxo-17β-hydroxyandrosta-4,6-dien-17α-yl)-propionic acid lactone; Aldadiene; Canrenone; NSC 261713; Phanurane; SC 9376; Spirolactone SC 14266