CRYSTAL FORM OF JAK INHIBITOR AND PREPARATION METHOD THEREOF

摘要

The present invention relates to a new crystal form of a JAK inhibitor and a preparation method thereof. The new crystal form provided in the present invention can be used to treat autoimmunity disease and particularly rheumatoid arthritis. The new crystal form provided in the present invention is stable, a purification process has a remarkable effect on the new crystal form, and the solubility and hygroscopicity thereof meet the medicinal requirement. The new crystal form is simple to prepare, has low costs and has an important value to future optimization and development of the medicine.