Benzoic acid derivatives of the formula: ##STR1## wherein n is an integer of 0 to 2; R.sub.1 to R.sub.3 which may be the same or different each represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group or nitro group; R.sub.4 is a hydroxyl group or the group --NHZ (Z is hydrogen atom or a lower alkyl group), or an alkali metal salts thereof are useful as an infection control agent. These derivatives excepting compounds of the formula above wherein n is 0 or 1; any one of R.sub.1 to R.sub.3 is 5-chloro, 5-methoxy or 5-nitro and the remainder is a hydrogen atom; and R.sub.4 is a hydroxyl group; and compounds of the formula wherein n is 0 or 1; two of R.sub.1 to R.sub.3 are 3,5-dichloro or 3,5-dinitro and the remainder is a hydrogen atom; and R.sub.4 is a hydroxy group) are novel, and they were first prepared in this invention.
苯甲酸衍
生物的
化学式为:##STR1## 其中n为0至2的整数;R.sub.1到R.sub.3可以相同或不同,分别代表氢原子、卤素原子、较低的烷基、较低的烷氧基或硝基;R.sub.4为羟基或--NHZ基团(其中Z为氢原子或较低的烷基),或其碱
金属盐,在感染控制剂中有用。这些衍
生物除了式中n为0或1,其中任一R.sub.1到R.sub.3为5-
氯、5-甲氧或5-硝基,其余为氢原子;以及式中R.sub.4为羟基的化合物;以及式中n为0或1,其中两个R.sub.1到R.sub.3为3,5-二
氯或3,5-二硝基,其余为氢原子;以及R.sub.4为羟基的化合物)是新颖的,在本发明中首次制备。