Compounds of formula (I):
and pharmaceutically acceptable salts thereof wherein R1, R2, R3 and R4 which may be the same or different, represent hydrogen, halogen, nitro, lower alkyl, or lower alkoxy, or any adjacent two of R1 to R4 taken together represent an alkylene group containing from 3 to 5 carbon atoms or a 1,4-buta-1,3- dienylene group are disclosed together with a method for their preparation. The compounds are useful as anti-allergic agents. With the exception of 4,9-dioxo-1H-naphtho-[2,3-d]-triazole, and its salts, all compounds of formula (I) are novel.
式(I)化合物:及其药学上可接受的盐,其中 R1、R2、R3 和 R4 可以相同或不同,代表
氢、卤素、硝基、低级烷基或低级烷
氧基,或 R1 至 R4 中任意相邻两个共同代表含有 3 至 5 个
碳原子的亚烷基或 1,4-丁-1,3-二
烯基。 这些化合物可用作抗过敏剂。 除 4,9-二
氧代-1H-
萘并-[2,3-d]-三唑及其盐类外,所有式(I)化合物均为新型化合物。