Compounds of formula I ##STR1## and pharmaceutically acceptable salts thereof; in which R.sub.1 and R.sub.2, which are the same or different, are H or an optionally substituted hydrocarbon group or R.sub.1 and R.sub.2 together with the nitrogen atom to which they are attached form an optionally substituted heterocyclic ring; R.sub.3 is an optionally substituted aromatic hydrocarbon group; and R.sub.4 is a hydrocarbon group containing at least one substituent selected from the group consisting of hydroxy and acylated derivatives thereof, optionally substituted alkoxy groups, optionally substituted cycloalkyloxy groups, optionally substituted alkylenedioxy groups, oxo and groups of formula S(O).sub.p R.sub.5 in which p is 0, 1 or 2 and R.sub.5 is an alkyl group, said hydrocarbon group being optionally substituted by additional substituents, are useful in the treatment of depression.
化合物I的公式及其药学上可接受的盐;其中R1和R2,相同或不同,是氢或一种可选取代的碳氢基团,或者R1和R2与它们所连接的氮原子一起形成一种可选取代的杂环环;R3是一种可选取代的芳香碳氢基团;R4是一种含有至少一种取代基的碳氢基团,所述取代基选自羟基和酰基衍
生物,可选取代的烷氧基团,可选取代的环烷氧基团,可选取代的烯二氧基基团,氧代和公式S(O)pR5的基团,其中p为0、1或2,R5是一种烷基基团,所述碳氢基团可以被额外的取代基所取代,适用于治疗抑郁症。