Bright offer (the R) -3- of this Hair (4- (7H- pyrrolo- [2,3-d] pyrimidine-4-yl) -1H- pyrazol-1-yl) -3- Ring amyl propionitrile Which form, the disease of its useful what Zhi Treatment With Zhan Satisfied Si kinase activity Xiang Off of useful Yu Tone Festival Zhan Satisfied Si kinase activity And, including such as Mian Yi Xiang Off disease, Pi Skin disease, myeloproliferative illness, cancer and other diseases.本發明提供(R)-3-(4-(7H-吡咯并[2,3-d]嘧啶-4-基)-1H-吡唑-1-基)-3-環戊基丙腈的鹽形式,其有用於調節詹納斯激酶活性,並有用於治療與詹納斯激酶活性相關的疾病,包括例如免疫相關疾病、皮膚病、骨髓增生性病症、癌症以及其他疾病。