Indazole-3-carboxylic acid derivatives represented by the following general formula (I) and their physiologically acceptable acid addition salts or quaternary ammonium salts, ##STR1## are useful as a potent and selective antagonist of serotonin 3 (5-HT.sub.3) receptor. Also disclosed are compounds of the formula ##STR2## which are useful as intermediates in the production of the disclosed final product compounds.
以下是通式(I)所代表的
吲唑-3-羧酸衍
生物及其生理上可接受的酸盐或季
铵盐,##STR1## 作为一种有效和选择性的5-羟
色胺3(5-HT.sub.3)受体拮抗剂。还公开了通式 ##STR2## 的化合物,它们在制备公开的最终产物化合物方面是有用的中间体。