abstract |
The present invention suppresses the proliferation of activated T cells, or suppresses the production of interferon alpha (IFN-α) by activated plasmacytoid dendritic cells (pDC) to suppress the function of immune cells, thereby suppressing the immune system. It is an object of the present invention to provide a compound useful as a therapeutic or prophylactic agent for an autoimmune disease such as lupus erythematosus (SLE) and lupus nephritis in patients with systemic lupus erythematosus (SLE) and SLE. The present invention has the general formula (I): [During the ceremony, X, R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are as described herein] Provided is a compound represented by or a pharmaceutically acceptable salt thereof. |