The invention relates to certain fused ring compounds, or pharmaceutically acceptable salts, solvates, clathrates, or prodrugs thereof, that are useful as immunosuppressive agents and for treating and preventing inflammatory conditions, allergic disorders, and immune disorders.本發明係關於某些稠合環化合物或其醫藥上可接受之鹽、溶劑合物、晶籠化合物或前藥,其可做為免疫抑制劑,用於治療及預防發炎病症、過敏性失調及免疫性失調。