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.
公式(1)和(2)的化合物:##STR1## 其中:X和Y独立地为氢、羟基、低烷基、低烷氧基或卤素,或者X和Y一起为亚甲二氧基或
乙烯-1,2-二氧基,R为低烷基、可选择的取代苯基、--(CH.sub.2).sub.m OR.sup.1或--NR.sup.1 R.sup.2,其中m为1至6的整数,R.sup.1和R.sup.2独立地为氢或低烷基,或者--NR.sup.1 R.sup.2一起为下列式的杂环:##STR2## 其中A为--CH.sub.2--、--NR.sup.1--或氧,或其药学上可接受的盐,可用作α.sub.2-阻滞剂,特别是抗抑郁剂。