A compound of the formula ##STR1## wherein R.sup.1 is an alkyl group with 1-3 carbon atoms, R.sup.2 and R.sup.3 are the same or different and each is hydrogen, chlorine or bromine; and pharmaceutically acceptable salts and optical isomers thereof; methods and intermediates for the preparation of the compounds; pharmaceutical preparations containing them and their medical use for the treatment of psychoses.
一种化合物的分子式为##STR1##,其中R.sup.1是含有1-3个碳原子的烷基基团,R.sup.2和R.sup.3相同或不同,且每个都是氢、
氯或
溴;以及其药用可接受盐和光学异构体;制备该化合物的方法和中间体;含有它们的药物制剂以及它们用于治疗精神病的医疗用途。