Regioselective synthesis and cytotoxicities of camptothecin derivatives modified at the 7-, 10- and 20-positions

Regioselective synthesis and cytotoxicities of camptothecin derivatives modified at the 7-, 10- and 20-positions Design and one-pot synthesis of new 7-acyl camptothecin derivatives as potent cytotoxic agents Synthesis and in vitro cytotoxicity of C(20)(RS)-camptothecin analogues modified at both B (or A) and E ring Novel camptothecin derivatives. part 1: oxyalkanoic acid esters of camptothecin and their in vitro and in vivo antitumor activity Synthesis and in vitro cytotoxicity of hexacyclic camptothecin analogues Novel hexacyclic camptothecin derivatives. Part 1: Synthesis and cytotoxicity of camptothecins with an A-ring fused 1,3-oxazine ring Synthesis and antitumor activity of 7-ethyl-9-alkyl derivatives of camptothecin Design and synthesis of new 7-(N-substituted-methyl)-camptothecin derivatives as potent cytotoxic agents 7-Cycloalkylcamptothecin derivatives: Preparation and biological evaluation 7-Silylcamptothecins (silatecans): A new family of camptothecin antitumor agents