5-NIdR (1- (β-D-2-Deoxyribofuranosyl) -5-nitroindole), an artificial nucleoside, exhibits the ability to inhibit the replication of DNA lesions generated by Temozolomide. 5-NIdR induces cancer cells apoptosis and arrests cell cycle at G0 phase. 5-NIdR enhances Temozolomide anti-tumor efficacy in murine glioblastoma model[1].