| 摘要 |
The compounds <IMAGE> where R is hydrogen, alkyl, phenylalkyl or dialkylamino alkyl; R1 is hydrogen, alkyl or phenyl; X is -S- or -NH- A is hydrogen, acyl, aroyl, alkyl or substituted alkyl in which the substituent is alkoxycarbonyl or phenylalkyl; n is 0, 1 or 2; or a pharmaceutically acceptable salt thereof are antihypertensive agents of the ACE inhibitor type.
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