| abstract |
A quinoxalinone derivative of the formula (I): (see 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 (see formula II) is, for example, the formula: (see formula III) B1, B2, ......, Bn-1 and B n, (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. |