The quinazoline derivative having the formula ##STR1## and pharmaceutically acceptable salts thereof are selective immunosuppressive agents useful in the treatment of immune complex diseases such as rheumatoid arthritis.
                            具有以下结构式 ##STR1## 和其药学上可接受的盐的
喹唑啉衍
生物是选择性
免疫抑制剂,可用于治疗免疫复合物疾病,如类风湿性关节炎。