| abstract |
A method for treating cancer that includes administering a pharmaceutically effective amount of a composition containing a compound represented by formula (I) or a pharmacologically acceptable salt thereof. In the formula, A represents a 5- to 10-membered heteroaryl group, or a C 6-10 aryl group; R 1 and R 2 independently represent H, OH, X, CN, NO 2 , a C 1-4 haloalkyl group, a C 1-6 alkyl group, or the like <R 1 and R 2 together form a (substituted) 3- to 10-membered heterocyclyl group or a (substituted) 5- to 10-membered heteroaryl group>; R 3 represents H, a C 1-5 alkyl group, a C 6-10 aryl group, a C 1-5 alkyl group, or a C 1-4 haloalkyl group; and R 4 represents H, X, a C 1-3 alkyl group, a C 1-4 haloalkyl group, OH, CN, NO 2 , or the like. |