abstract |
A purpose of the present invention is to provide TNF-± production inhibitors being useful as therapeutic agents for autoimmune diseases such as rheumatoid arthritis. Novel compounds having the structure represented by the general formula [1] or salts thereof according to the present invention have excellent TNF-± production inhibitory activities, nwherein "A" is -(NR 4 )-, or -O-, "B" is alkylene or alkenylene, R 1 , R 2 and R 4 are hydrogen, alkyl, alkenyl, adamantyl or the like, R 3 is a pyridine ring, and "X" is oxygen or sulfer respectively. |