A compound represented by the following formula (1) or a salt thereof:
The compound has an inhibitory activity on the production of interleukin-6, and is therefore useful as a preventive and/or therapeutic agent for a disease associated with interleukin-6, ocular inflammatory diseases and the like. In the formula, R
1
represents a halogen atom, a hydrogen atom, a lower alkyl group which may have a substituent, a formyl group, or a lower alkylcarbonyl group which may have a substituent, R
2
represents a bicyclic hydrocarbon group which may have a substituent or a bicyclic heterocyclic group which may have a substituent, R
3
represents a hydrogen atom, a lower alkyl group which may have a substituent, an aryl group which may have a substituent, or an acyl group.
以下式子(1)所表示的化合物或其盐:该化合物具有抑制白细胞介素-6产生的活性,因此可用作预防和/或治疗与白细胞介素-6有关的疾病,如眼部炎症性疾病等的药物。在该式中,R1表示卤素原子、氢原子、可能具有取代基的较低烷基、甲酰基或可能具有取代基的较低烷基羰基基团,R2表示可能具有取代基的双
环烃基团或双环杂环基团,R3表示氢原子、可能具有取代基的较低烷基、可能具有取代基的芳基或酰基基团。