This invention describes the new 18-nor steroids (gonatrienes) of general formula (I), in which R
1
, R
2
, R
3
, R
6
, R
7
, R
8
, R
9
, R
11
, R
11
′, R
14
, R
15
, R
15
, R
16
, R
17
and R
17
′ have the meanings that are indicated in the description, as pharmaceutical active ingredients that have in vitro a higher affinity to estrogen receptor preparations of rat prostates than to estrogen receptor preparations of rat uteri and in vivo a preferential action on bone in comparison to the uterus, and/or pronounced action relative to the stimulation of the expression of 5HT2a-receptors and transporters, their production, their therapeutic use and pharmaceutical dispensing forms that contain the new compounds.
The invention further describes the use of steroids, on which the gonatriene skeleton is based, for treatment of estrogen-deficiency-induced diseases and conditions as well as the use of the gonatriene structural part in the total structures of compounds that have a dissociation in favor of their estrogenic action on bone in comparison to the uterus.
The invention relates to novel 18-norsteroids (gonatrienes) of general formula (I), wherein R
1
, R
2
, R
3
, R
6
, R
7
, R
8
, R
9
, R
11
, R
11′
, R
14
, R
15
, R
15′
, R
16
, R
17
and R
17′
have the meaning cited in the description, and to the use of said compounds as pharmaceutical active ingredients. Said compounds exhibit a high affinity in vitro for estrogen receptor preparations of rat prostate and in an estrogen receptor preparation of rat uterus. Said compounds exhibit in vivo preferential activity on bones as compared to the uterus and/or significant activity with regard to stimulating the expression of 5HT2a-receptors and transporter molecules. The invention also relates to the production of said compounds, therapeutic use and galenic form of said compounds contained in the novel compounds of invention. The invention also relates to utilization of steroids based on the gonatriene molecular skeleton in order to treat estrogen deficiency-induced diseases and disorders, in addition to the use of said gonatriene structural component in the total structure of compounds which dissociate to produce enhanced estrogen activity in bone as compared to the uterus