Compounds of formulas (1) and (2): ##STR1## in which: X and Y are independently hydrogen, hydroxy, lower alkyl, lower alkoxy or halo, or X and Y taken together is methylenendioxy or ethylene-1,2-dioxy, and R is lower alkyl, optionally substituted phenyl, --(CH.sub.2).sub.m OR.sup.1 or --NR.sup.1 R.sup.2 wherein m is an integer of 1 to 6 and R.sup.1 and R.sup.2 are independently hydrogen or lower alkyl, or --NR.sup.1 R.sup.2 taken together is a heterocycle of the formula: ##STR2## wherein A is --CH.sub.2 --, --NR.sup.1 -- or oxygen, or a pharmaceutically acceptable salt thereof, are useful as .alpha..sub.2 -blockers, especially as antidepressants.
化合物的公式(1)和(2):##STR1## 其中:X和Y独立地是氢,羟基,低烷基,低烷氧基或卤素,或X和Y一起是亚甲二氧基或
乙烯-1,2-二氧基,而R是低烷基,可选择性地取代苯基,--(CH.sub.2).sub.m OR.sup.1或--NR.sup.1 R.sup.2,其中m是1到6的整数,R.sup.1和R.sup.2独立地是氢或低烷基,或--NR.sup.1 R.sup.2一起是公式的杂环:##STR2## 其中A是--CH.sub.2--,--NR.sup.1--或氧,或其药学上可接受的盐,可用作α.sub.2-受体阻滞剂,特别是抗抑郁剂。