The invention relates to a compound of formula I ##STR1## or pharmaceutically acceptable acid addition salts thereof, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are the same or different and represent hydrogen, or lower alkyl, and R.sup.6 represents hydrogen, alkyl or 1 to 3 carbon atoms, which may be substituted by diloweralkylamino; lower alkanoyl or aroyl. The compounds are either anti-ulcer agents or intermediates for such compounds.
本发明涉及式I的化合物 ##STR1## 或其药学上可接受的酸盐,其中R.sup.1、R.sup.2、R.sup.3、R.sup.4和R.sup.5相同或不同,代表氢或低碳基,R.sup.6代表氢、烷基或1至3个碳原子,可被二低碳基
氨基取代;低烷酰基或芳酰基。这些化合物是抗溃疡剂或该类化合物的中间体。