A quinoxalinone derivative of the formula (I):
 or a pharmaceutically acceptable salt or ester thereof, wherein;
   X is NH, S or the like;
   Y is O or the like;
   the partial structure
 is, for example, the formula:
    B1, B2, ....., Bn-1 and Bn, (in which n is 4 , 5 or 6) are each independently CH, N or the like;
   B'1, B'2, ....., B'n-1 and B'n (in which n is 4, 5 or 6) are each independently hydrogen or the like; and
   R is hydrogen, lower alkyl or the like.
                            式(I)的
喹喔啉酮衍
生物:
 或其药学上可接受的盐或酯,其中
X 是 NH、S 或类似物
Y 是 O 或类似物;
部分结构
 例如为式
 B1、B2、.....、Bn-1 和 Bn,(其中 n 为 4、5 或 6)各自独立地为 CH、N 或类似物;
B'1、B'2、.....、B'n-1 和 B'n(其中 n 为 4、5 或 6)各自独立地为氢或类似物;以及
R 是氢、低级烷基或类似物。