Several drug classes which are listed top on the list include topoisomerase inhibitors (camptothecin, ellipticine, doxorubicin, etoposide, thioguanine, thioguanosine), multiple histone deacetylase inhibitors (trichostatin A, vorinostat, 5162773, 5186223), PARP inhibitors (1,5-isoquinolinediol, 3-aminobenzamide, phenanthridinone), proteasome inhibitors (MG132, 1,4 chrysenequinone) and cyclin-dependent kinases (CDKs) inhibitors (alsterpaullone, 02974170002B, GW-8510).
Source: wiktionary