52-01-7 7-(Acetylthio)-17-hydroxy-3-oxopregn-4-ene-21-carboxylic acid gamma-lactone AIDS-001599 AIDS001599 Aldactone Aldactone A Pregn-4-ene-21-carboxylic acid, 7-(acetylthio)-17-hydroxy-3-oxo-, g-lactone, (7a,17a)- SC 9420 Spiresis Spiridon Spirolactone Spirolang Spirone Spironolactone Spironolactone A Uractone Verospiron Verospirone