Compounds of the formula: ##STR1## in which R.sup.1 is lower alkoxy, R.sup.2 is bromine or lower alkoxy, and R.sup.3 is aryl, heteroaryl or a group --Q--R.sup.30, wherein Q is ethylene, vinylene or ethynylene and R.sup.30 is aryl, heteroaryl, lower alkoxycarbonyl or carbamoyl; hydrolyzable esters of carboxylic acids of formula I; and pharmaceutically acceptable salts of these compounds are useful for treating infectious diseases.
公式为:##STR1## 的化合物,其中R.sup.1是低碳氧基,R.sup.2是
溴或低碳氧基,R.sup.3是芳香族,杂芳基或--Q--R.sup.30基团,其中Q是
乙烯基,
乙烯基或
乙炔基,R.sup.30是芳香族,杂芳基,低碳氧基羰基或
氨基甲酰基;
化学上可
水解的I型
羧酸酯;以及这些化合物的药用可接受盐可用于治疗传染病。