The invention provides certain 4-keto-phenoxyacetic acids and their oximes of the formula: ##STR1## in which A is selected from oxygen and sulphur, Z is selected from oxygen and the group NOH, and X.sub.1 and X.sub.2 are radicals independently selected from hydrogen, halogen and methyl, with the proviso that the benzene nucleus is never substituted by two halogen atoms in ortho-position with respect of one another, and pharmaceutically acceptable alkaline and amine addition salts thereof.
本发明提供了某些4-酮基
苯氧乙酸及其氧
肟化物的化合物,其
化学式为:##STR1## 其中A选自氧和
硫,Z选自氧和NOH基团,X1和X2是独立选择的氢、卤素和甲基基团,但苯环上不得同时取代两个邻位的卤素原子,以及其药学上可接受的碱性和胺加盐。