Compounds of the general formula I ##STR1## wherein one of the two radicals R.sub.1 and R.sub.2 denotes the acyl radical of a carboxylic acid of aromatic character and the other denotes hydrogen or optionally esterified or etherified hydroxyl, R.sub.3 denotes hydrogen, alkyl or hydroxyalkyl, R.sub.4 denotes optionally esterified or amidized carboxyl, m denotes 1 or 2 and n denotes 0 or 1, in the free form or in the form of their salts are useful as antiphlogistics, mild analgesics, antipyretics and as anti-rheumatic agents.
通式I的化合物 ##STR1## 其中R.sub.1和R.sub.2中的一个表示具有芳香特性的
羧酸酰基,另一个表示氢或选择性地酯化或醚化的羟基,R.sub.3表示氢、烷基或羟基烷基,R.sub.4表示选择性地酯化或酰胺化的羧基,m为1或2,n为0或1,以自由形式或盐的形式作为抗炎、轻微的镇痛、退烧剂和抗风湿剂有用。