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 or 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.
具有以下式子的化合物:##STR1## 其中R.sub.1是苯基或环烷基,苯基可以具有至少一个从较低烷基,较低烷氧基,
氨基和硝基中选择的取代基; R.sub.2是氢或较低烷基; A是--CH.sub.2 O--或--CH.sub.2 CH(O-较低烷基)-; 当R.sub.1与(A).sub.n未取代的苯基时,n为零或1,R.sub.2为较低烷基; R.sub.3是氢或较低烷氧基,具有抗溃疡作用。