Method of preparation of derivatives of 9h - -pyrido (3,4 - b) indole and novel products thus obtained has activity of inhibition of xanthine oxidase inhibitors -

摘要

1-Substituted-9H-pyrido[3,4-b]indole derivatives, which are further optionally substituted in the 3- or 4-position, are inhibitors of xanthine-oxidase. A representative embodiment is 1-formyl-4-hydroxy-9H-pyrido[3,4-b]indole which can be prepared through the processing of Picrasma quassioides.