| abstract |
The present invention provides a compound of the formula (I) that has excellent inhibition activity and is being useful as an active ingredient of an agent to treat and / or prevent various immune diseases including autoimmune diseases, inflammatory diseases, and diseases. allergic The compound according to the present invention has an inhibition cavity against JAK3 and is thus useful as an active ingredient of an agent to treat or prevent diseases caused by transmission of undesirable cytosine signal (eg rejection during organ transplant / tissue, immune diseases, multiple sclerosis, rheumatoid arthritis, psoriasis, asthma, atopic dermatitis, Alzheimer's disease, and atherosclerotic disease), or diseases caused by signal transmission of abnormal cytosine (eg cancer and leukemia). |