15alpha,16alpha-Dihydro-17-hydroxy-7alpha-mercapto-3-oxo-3'H-cyclopropa(15,16)-17alpha-pregna-1,4,15-triene-21-carboxylic acid, gamma-lactone, acetate 7alpha-Acetylthio-15beta,16beta-methylen-3-oxo-1,4-pregnadien-21,17beta-carbolacton 87952-98-5 Mespirenona [Spanish] Mespirenone Mespirenone [INN] Mespirenonum [Latin]