Drospirenone Alias: 6b,7b:15b,16b-Dimethylen-3-oxo-17a-pregn-4-ene-21,17-carbolactone; Dihydrospirorenone CAS NO: 67392-87-4 Molecular weight: 366.49 Molecular formula: C24H30O3 Packing: Foil bag Chemical Properties: Off-White Crystalline Powder Usage: Synthetic progestogen exhibiting antimineralocorticoid and antiandrogenic activity.