| 摘要 |
Compounds having the formula <IMAGE> or a pharmaceutically acceptable salt thereof, wherein R1 is alkyl, cycloalkyl or aryl; R2 is acyl or sulfonyl; R3 is alkylamino, dialkylamino or a nitrogen containing heterocyclic group; R4 is alkoxy; A1 is a saturated bond or an alkylene group having 1 to 4 carbon atoms; and A2 is an alkylene group having 2 to 5 carbon atoms; have antiinflammatory activity.
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