| 摘要 |
A compound of the formula <IMAGE> wherein R1 is hydrogen, lower alkyl, phenyl lower alkyl or halo substituted lower alkyl; R2 is hydrogen, lower alkyl, phenyl lower alkyl or halo substituted lower alkyl; n is 0, 1 or 2; X is -(CH2)mZ-; Z is oxygen, sulfur or imino; m is 0 or 1; Y is S-R or <IMAGE> R is hydrogen, lower alkyl, <IMAGE> R3 is lower alkyl, phenyl or phenyl lower alkyl; and R4 is hydroxy, amino, hydroxyamino or lower alkoxy. These compounds are useful as hypotensive agents.
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