4-Thiouridine (4-SU) is a photoactivatable ribonucleoside analog that is widely used for RNA analysis, including short-range RNA-RNA crosslinking and nascent RNA labeling. The crosslinking thio moiety is attached directly to the nucleotide base, thus 4-SU

Riddelline is a potent genotoxic agent in vitro and induces significant elevations in unscheduled DNA synthesis and S-phase synthesis in rat liver.

N-(4-fluorophenyl)benzo[d]thiazol-2-amine is a protein kinase inhibitor.