18-methyl-19-nor-17-pregn-4-ene-21,17-carbolactonas as well as pharmaceutical preparations containing these compounds.

18-methyl-19-nor-pregn-17-ene-21,17-4-carbolactonas of the general formula I ** (Omitted) ** in which Z represents an oxygen atom, two hydrogen atoms, one grouping = NOR or = NNHSO2R, where R is a hydrogen atom or an alkyl group of straight or branched chain with 1 to 4 or respectively 3 to 4 carbon atoms, R4 means a hydrogen atom, a halogen atom, a methyl group or a trifluoromethyl group, R6 and / or R7 may be located oe position independently of one another are an alkyl group of straight or branched chain with 1 to 4 or respectively 3 to 4 carbon atoms, or R 6 represents an atom of hydrogen and R7 is an alkyl group of straight or branched chain with 1 to 4 or respectively 3 to 4 carbon atoms, or in position, or R6 and R7 together mean a methylene group in position oo an additional bond.