Compounds of formula: ##STR1## wherein R is hydroxyl, lower alkoxy having 1 to 4 carbon atoms or amino and R.sup.1 is hydrogen or lower alkyl having 1 to 4 carbon atoms, are useful as medicines such as antipyretics, analgesics and antiinflammatory agents.
式为##STR1##的化合物,其中R是羟基、1到4个碳原子的低烷氧基或
氨基,R.sup.1是氢或1到4个碳原子的低烷基,可用作药物,如退热药、镇痛剂和抗炎药。