The invention relates to compounds of formula II ##STR1## and their pharmaceutically acceptable salts wherein R.sup.5 represents hydrogen, acyl, lower alkyl or cycloalkyl; R.sup.6 represents hydrogen, halogen, trifluormethyl, or lower alkyl; R.sup.7 represents hydrogen, lower alkyl, hydroxy, lower alkoxy, arylloweralkoxy; R.sup.8 represents hydrogen or lower alkyl; and R.sup.9 represents hydrogen or lower alkyl. The compounds have dopamine blockade activity and may be used in the treatment of psychoses including schizophrenia.
该发明涉及公式II的化合物及其药学上可接受的盐,其中R.sup.5代表氢、酰基、较低的烷基或环烷基;R.sup.6代表氢、卤素、三
氟甲基或较低的烷基;R.sup.7代表氢、较低的烷基、羟基、较低的烷氧基、芳基较低烷氧基;R.sup.8代表氢或较低的烷基;R.sup.9代表氢或较低的烷基。这些化合物具有
多巴胺阻滞活性,可用于治疗包括精神分裂症在内的精神病。