Compounds having the formula: ##STR1## wherein R.sub.1 is phenyl or cycloalkyl and the phenyl may have at least one substituent selected from the group consisting of lower alkyl, lower alkoxy, amino and nitro; R.sub.2 is hydrogen or lower alkyl; A is --CH.sub.2 O-- or --CH.sub.2 CH(O-lower alkyl)-; n is zero (0) or one (1); when R.sub.1 together with (A).sub.n is unsubstituted phenyl, R.sub.2 is lower alkyl; and R.sub.3 is hydrogen or lower alkoxy, have anti-ulcerousaction.
化合物的
化学式为:##STR1## 其中R.sub.1是苯基或环烷基,苯基可能具有至少一个选自下列群组的取代基,该群组包括低碳基,低氧基,
氨基和硝基;R.sub.2是氢或低碳基;A是--CH.sub.2 O--或--CH.sub.2 CH(O-低碳基)-;n为零(0)或一(1);当R.sub.1与(A).sub.n一起为未取代的苯基时,R.sub.2为低碳基;且R.sub.3为氢或低氧基,具有抗溃疡作用。