Compounds represented by general formula (I) or salts thereof and anti-inflammatory agents and antitumor agents containing these compounds as the active ingredient, wherein R1 represents hydrogen or lower alkyl; R2 represents lower alkyl or (CH2)n1 COOH (wherein n1 is 1, 2 or 3); R3 represents hydrogen, halogeno, carboxy, etc.; R4 represents phenyl optionally having a specific substituent, dicyclic heteroaryl, phenylethynyl or lower alkynyl; and R5 represents lower alkyl, amino, etc.
通式(I)代表的化合物或其盐,以及含有这些化合物作为活性成分的抗炎剂和抗肿瘤剂,其中R1代表
氢或低级烷基;R2代表低级烷基或(
CH2)n1 COOH(其中n1为1、2或3);R3代表
氢、卤素、羧基等;R4代表任选具有特定取代基的
苯基、二环杂芳基、
苯基
乙炔基或低级炔基;R5代表低级烷基、
氨基等。