 Polycyclic organic compounds, Heterocyclic compounds, Topoisomerase inhibitors - Chemical Safety, Models, Suppliers, Regulation, and PatentsPolycyclic organic compounds, Heterocyclic compounds, Topoisomerase inhibitors6-Nitrobenzothiazole 2942-06-524072-75-1 24072-75-12-Methylthiobenzothiazole 64036-43-7, 31621-01-9, 615-22-5 