| 摘要 |
Hypertension can be treated using compounds having the formula <IMAGE> or a basic salt thereof, wherein R1 is hydrogen, alkyl, aryl, arylalkyl or <IMAGE> wherein R5 is alkyl or aryl; R2 is hydrogen or alkyl; R3 is aryl; R4 is hydrogen, alkyl or arylalkyl and n is 0, 1 or 2.
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