| abstract |
A quinoxalinone derivative of the formula (I): n nor a pharmaceutically acceptable salt or ester thereof, wherein;n X is NH, S or the like; Y is O or the like; the partial structure n nis, for example, the formula:n n n n n n n n n n n n n B 1 , B 2 , . . . , B n−1 and B n , (in which n is 4, 5 or 6) are each independently CH, N or the like; n 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 n R is hydrogen, lower alkyl or the like. |