| 摘要 |
A compound of the formula <IMAGE> I wherein A together with the two carbon atoms denoted by alpha and beta is the group <IMAGE> (a) <IMAGE> (b) or <IMAGE> (c) and further wherein the substituents R1, R2, and R3 are as described in the specification, can be used in the treatment of neurological symptoms which are associated with circulatory disorders of the brain, especially in the treatment of neurological symptoms which are associated with cerebrovascular seizures.
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