A compound of the formula (1):
1
wherein —X
1
—X
2
— is a group of the formula: —C(═O)—N(R
7
)— or —C(R
8
)═N— (in which R
7
is hydrogen, substituted or unsubstituted alkyl, etc.; and R
8
is halogen, etc.); R
1
, R
2
and R
3
are independently hydrogen, substituted or unsubstituted alkyl, etc.; and R
4
is substituted or unsubstituted alkylene, or a prodrug thereof, or a pharmaceutically acceptable salt of the same, which exhibits an inhibitory activity of poly(ADP-ribose)polymerase (PARP) and is useful as remedies for diseases caused by the accelerated PARP activity such as brain ischemic disorders.
式(1)的化合物:其中—X1—X2—是以下式的基团:—C(═O)—N(R7)—或—C(R8)═N—(其中R7为氢、取代或未取代的烷基等;R8为卤素等);R1、R2和R3独立地为氢、取代或未取代的烷基等;R4为取代或未取代的亚烷基,或其前药,或其药用可接受的盐,该化合物具有对多聚(
ADP-
核糖)聚合酶(PARP)的抑制活性,并可用作用于由加速的PARP活性引起的疾病的药物,如脑缺血性疾病。