Patent ID: 8377987

Claim:
A method for treating arthritis, wherein said method comprises administering, to a subject in need of such treatment, an effective amount of an isolated compound or a salt thereof, wherein said compound has the following formula: wherein R 1 is alkyl; R 2 is H or alkyl; R 3 , R 4 , and R 5 are independently —H, acyl, halo, haloalkyl, amino, alkylamino, hydroxyl, alkyl, hydroxylalkyl, or —COOH; R 6 is —O or —NH; R 7 is —H, alkyl, alkoxy, hydroxylalkyl, hydroxyl, or halo; R 8 , R 9 , and R 12 are independently —H, acyl, halo, amino, alkylamino, hydroxyl, alkyl, hydroxylalkyl, or —COOH; R 10 is H or alkyl; and R 11 is H or alkyl.