| 摘要 |
Title compds. (I; R = hydroxy, NH2, lower alkoxy; R1, R4=H, lower alkyl, phenyl, phenyl-lower alkyl; R2 = H, lower allyl, phenyl, substd. phenyl, etc.; R3 = H, hydroxy, lower alkyl) were prepd. by acylating compd. (II) with acid(III). The product, as angiotensin-converting enzyme inhibitor, exhibits anti-hypertensive effect.
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