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.
化学式I的化合物及其药学上可接受的盐;其中R.sub.1和R.sub.2,它们相同或不同,是H或一个可选地取代的碳氢基团,或者R.sub.1和R.sub.2与它们连接的氮原子一起形成一个可选地取代的杂环环;R.sub.3是一个可选地取代的芳香碳氢基团;R.sub.4是一个含有至少一种亲
水基团或酰化衍
生物的碳氢基团,可选地取代的烷氧基团,可选地取代的环烷氧基团,可选地取代的烷二氧基基团,氧代基和
化学式S(O).sub.p R.sub.5中的基团,其中p为0、1或2,R.sub.5是一个烷基基团,所述碳氢基团可选地由额外的取代基团取代,在抑郁症的治疗中有用。