Compounds of formula (I): ##STR1## (in which: R.sup.1 represents fluorinated methoxy; R.sup.2 represents a nitrogen-containing heterocyclic group and R.sup.3 represents hydrogen or amino) and pharmaceutically acceptable salts, esters and amides thereof are valuable antibacterial agents, which may be prepared by reacting a compound similar to that of formula (I) but in which R.sup.2 is replaced by a halogen atom with a compound providing the required group R.sup.2.
式(I)的化合物:##STR1##(其中:R.sup.1代表
氟代甲氧基;R.sup.2代表含氮杂环基团;R.sup.3代表氢或
氨基),以及其药学上可接受的盐、酯和酰胺是有价值的抗菌剂。这些化合物可以通过将类似于式(I)但其中R.sup.2被卤素原子取代的化合物与提供所需基团R.sup.2的化合物反应而制备得到。