15?-Methyl-6?,7?-methylene-3-oxo-17?-pregn-4-ene-21,17-carbolactone; 17-Hydroxy-15?-methyl-6?,7?-methylene-3-oxo-17?-pregn-4-ene-21-carboxylic Acid, ?-Lactone; Drospirenone Impurity F; (2'S,4aR,4bS,6aS,9R,9aS,9bR,9cR,10aR)-4a,6a,9-trimethyl-4,4a,4b,5,6,6a,9,9a,9b,9c,10,10a-dodecahydro-2H,3'H-spiro[cyclopenta[a]cyclopropa[l]phenanthrene-7,2'-furan]-2,5'(3H,4'H,8H)-dione,3â€-16-secodrospirenone ; 15?-methyl-3-oxo-6?,7?-dihydro-3?H-cyclopropa[6,7]-17?-pregn-4-ene-21,17-carbolactone.
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