RT Journal Article SR Electronic T1 Novel stable camptothecin derivatives replacing the E-ring lactone by a ketone function are potent inhibitors of topoisomerase I and promising antitumor drugs JF Molecular Pharmacology JO Mol Pharmacol FD American Society for Pharmacology and Experimental Therapeutics DO 10.1124/mol.107.034637 A1 Amelie Lansiaux A1 Stephane Leonce A1 Laurence Kraus-Berthier A1 Christine Bal A1 Romain Mazinghien A1 Sebastien Didier A1 Marie-Helene David-Cordonnier A1 Patrick Hautefaye A1 Gilbert Lavielle A1 Christian Bailly A1 John Hickman A1 Alain Pierre YR 2007 UL http://molpharm.aspetjournals.org/content/early/2007/05/09/mol.107.034637.abstract AB