| 摘要 |
This invention provides new compounds of formula I, <IMAGE> I wherein R1 is hydrogen, alkyl of 2 to 8 carbon atoms, or phenylalkyl of 7 to 9 carbon atoms, and R2 is branched alkyl of 3 or 4 carbon atoms or benzyl, USEFUL AS AGENTS FOR THE TREATMENT OF MIGRAINE, HYPOTONIA AND ORTHOSTATIC DISORDERS.
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