This product is white or almost white crystalline powder, odorless, tasteless, insoluble in water, slightly soluble in acetonitrile, soluble in dichloromethane, tetrahydrofuran, chloroform and ethanol. It is a new anti rheumatic drug for relieving the disease, which can alleviate joint damage and immune abnormality of chronic arthritis and autoimmune diseases, and inhibit the production of inflammatory cytokines and immunoglobulin.