Compounds of the following formula and their pharmaceutically acceptable salts ##STR1## wherein R.sub.1 and R.sub.4 are the same or different and are each a five or six membered N containing heterocycle attached at an available N atom; R.sub.2 is hydrogen, alkyl, trifluoromethyl, phenyl, benzyl, --(CH.sub.2).sub.n --R.sub.4 or --(CH.sub.2).sub.n --N(alkyl).sub.2 ; R.sub.3 is hydrogen, halogen, nitro, trifluoromethyl, alkyl, alkoxy, or alkylthio; and n is an integer from 1 to 4; are disclosed. These compounds are useful as anti-inflammatory agents.
                            以下化合物及其药学上可接受的盐的公式为:##STR1## 其中 R.sub.1 和 R.sub.4 相同或不同,均为连接在可用的N原子上的五元或六元含氮杂环;R.sub.2 为氢、烷基、三
氟甲基、苯基、苄基、--(CH.sub.2).sub.n --R.sub.4 或--(CH.sub.2).sub.n --N(烷基).sub.2 ;R.sub.3 为氢、卤素、硝基、三
氟甲基、烷基、烷氧基或烷
硫基;n 为1至4的整数。这些化合物可用作抗炎药物。