| 摘要 |
PCT No. PCT/JP81/00401 Sec. 371 Date Jul. 27, 1982 Sec. 102(e) Date Jul. 27, 1982 PCT Filed Dec. 22, 1981 PCT Pub. No. WO82/02200 PCT Pub. Date Jul. 8, 1982.This invention relates to the compound of the general formula [I], process for preparing the compound and antihypertensive agent containing the compound as a main ingredient. <IMAGE> [I] wherein R1 is hydrogen, hydroxy, lower alkyl or lower alkoxy; R2 is hydrogen, benzoyl or <IMAGE> R3 is hydroxy, lower alkoxy, -NHOH or <IMAGE> R4 is <IMAGE> R5 is hydrogen or halogen; R6 and R7 each is hydrogen or lower alkyl; Z is straight or branched alkylene containing 1 to 3 carbon atoms; when R3 is hydroxy or lower alkoxy, R2 is <IMAGE> and salts thereof, said lower alkyl and lower alkoxy groups contain 1 to 6 carbon atoms.
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