Certain tricyclic thioxanthone-10,10-dioxide compounds each of which is substituted in the 1-,2-,3- or 4-position by a carboxyl or (5-tetrazolyl) group and each of which is optionally substituted in the 5-,6-,7- or 8-position by a second carboxyl or (5-tetrazolyl) group or a substituent selected from cyano, halogen, nitro, alkyl, alkoxy, acyl, amino, acylamino, thioalkyl, alkylsulphinyl and alkylsulphonyl, as well as salts, and optionally substituted esters and amides of the carboxyl substituted compounds and alkyl derivatives of the tetrazolyl substituted compounds, are useful for the relief or prophylaxis of allergic conditions.
一些
三环噻二
氧杂蒽-10,10-二
氧化物化合物,其中每个在1、2、3或4位被羧基或(5-
四唑基)基取代,同时每个在5、6、7或8位可选择地被第二个羧基或(5-
四唑基)基或
氰基、卤素、硝基、烷基、烷
氧基、酰基、
氨基、
酰胺基、
硫代烷基、烷基砜基和烷基砜基等取代基取代,以及这些羧基取代化合物的盐、可选择地取代的
酯和
酰胺以及
四唑基取代化合物的烷基衍
生物,可用于缓解或预防过敏症状。