| 摘要 |
A bicyclic heteroaromatic compound according to general formula I, or a pharmaceutically acceptable salt thereof,
wherein
R 1 is (6 -14C)aryl optionally substituted with one or more substituents; R 2 is (1-4C)alkyl,; R 3 is (1-8C)alkyl; Y is N; Z is NH 2 or OH; A is S and B is N(H) or O; X1-X2 is C=C, S or O. The compounds of the invention can be used in fertility regulation therapies.
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