The authors would like to acknowledge, via this correction, that synthetic routes to 6-substituted indenoisoquinolines and other related indenoisoquinolines have been previously published.1,2 The omission of these citations in our original publication was an oversight.
References
- Nagarajan M.; Morrell A.; Fort B. C.; Meckley M. R.; Antony S.; Kohlhagen G.; Pommier Y.; Cushman M. Synthesis and anticancer activity of simplified indenoisoquinoline topoisomerase I inhibitors lacking substituents on the aromatic rings. J. Med. Chem. 2004, 47235651–5661. [DOI] [PubMed] [Google Scholar]
- Morrell A.; Antony S.; Kohlhagen G.; Pommier Y.; Cushman M. Synthesis of benz[d]indeno[1,2-b]pyran-5,11-diones: Versatile intermediates for the design and synthesis of topoisomerase I inhibitors. Bioorg. Med. Chem. Lett. 2006, 16, 1846–1849. [DOI] [PubMed] [Google Scholar]