| abstract |
Compounds represented by general formula (I) or salts thereof and anti-inflammatory agents and antitumor agents containing thesencompounds as the active ingredient, wherein R 1 represents hydrogen or lower alkyl; R 2 represents lower alkyl or (CH 2 ) n1 COOHn(wherein n1 is 1, 2 or 3); R 3 represents hydrogen, halogeno, carboxy, etc.; R 4 represents phenyl optionally having a specific substituent,ndicyclic heteroaryl, phenylethynyl or lower alkynyl; and R 5 represents lower alkyl, amino, etc. |