Xanthone derivatives of the formula (I): ##STR1## wherein W, X, Y and Z which may be the same or different represent a hydrogen atom, a halogen atom or a lower alkyl group having 1 to 4 carbon atoms; A is a hydrogen atom B is a hydroxymethyl group, a lower alkoxycarbonyl group having 1 to 4 carbon atoms, or a carboxyl group, provided that a --O--CH.sub.2 --B group is bonded to the 2- or 3-position of the xanthone ring and that there is no case in which X, Y, and Z are each a hydrogen atom concurrently; as well as intoxic salts thereof when B is a carboxyl group, and a process for preparing the same are disclosed. The compounds of formula (I) in accordance with the present invention are useful as diuretics having uricosuric activity and can be used in the treatment of edema or hypertension.
公开了式(I)的
黄酮衍
生物:##STR1## 其中W、X、Y和Z可以相同也可以不同,表示氢原子、卤原子或具有1至4个碳原子的低烷基;A为氢原子,B为羟甲基基团、具有1至4个碳原子的低烷氧羰基基团或羧基,前提是--O--CH.sub.2--B基团与
黄酮环的2-或3-位键合,并且不存在X、Y和Z同时为氢原子的情况;当B为羧基时,还公开了其醇盐。还公开了制备这些化合物的方法。根据本发明的式(I)化合物在利尿剂具有
尿酸排泄活性方面有用,可用于
水肿或高血压的治疗。