2-HYDROXYOXANILIC ACID DERIVATIVES AND SALTS, THEIR PREPARATION AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM

摘要

2-hydroxyoxanilic acid derivatives shown by the following formula

and salts thereof possess an immunoregulatory action and can be useful as antiallergic agents, antiasthmatics, anti-rheumatics, carcinostatic agents, therapeutic agents for autoimmune disease, and suppressants of rejection in tissue transplants and skin grafts. They can be made from the corresponding aminophenols and oxalylic acids.