Patent ID: 8445469

Claim:
A 18-Methyl-19-nor-17-pregn-4-ene-21,17-carbolactone of general formula I in which Z means an oxygen atom, R 4 is a hydrogen atom, R 6 and R 7 can be in α- or β-position, and, independently of one another, mean a straight-chain or branched-chain alkyl group with 1 to 4 carbon atoms, or R 6 means a hydrogen atom, and R 7 means an α- or β-position, straight-chain or branched-chain alkyl group with 1 to 4 carbon atoms, or R 6 and R 7 each mean a hydrogen atom, or R 6 and R 7 together mean an α- or β-position methylene group or an additional bond, with the proviso that the compound is not 18-Methyl-15β,16β-methylene-3-oxo-19-nor-17-pregn-4-ene-21,17-carbolactone.