abstract |
Described are etheno- and ethano-19,11-bridged 4-estrenes of general formula (I), in which W, R1, R2, R6a, R6b, R7, R14, R15, R16, R11, R11' and R19 are defined in the description. Also described is a method of preparing them. These compounds exhibit a marked gestagenic action and are suitable for use in the production of drugs. |