Novel C-ring analogues of 20( S )-camptothecin. Part 3: synthesis and their in vitro cytotoxicity of A-, B- and C-ring analogues

Novel C-ring analogues of 20( S )-camptothecin. Part 3: synthesis and their in vitro cytotoxicity of A-, B- and C-ring analogues Synthesis and in vitro cytotoxicity of C(20)(RS)-camptothecin analogues modified at both B (or A) and E ring Plant antitumor agents. 25. Total synthesis and antileukemic activity of ring A substituted camptothecin analogs. Structure-activity correlations Novel hexacyclic camptothecin derivatives. Part 1: Synthesis and cytotoxicity of camptothecins with an A-ring fused 1,3-oxazine ring Plant antitumor agents. 23. Synthesis and antileukemic activity of camptothecin analogs Synthesis and in vitro cytotoxicity of (RS)-20-desethyl-20-substituted camptothecin analogues Synthesis and antitumor activity of 7-substituted 20(RS)-camptothecin analogues Synthesis and in vitro cytotoxicity of hexacyclic camptothecin analogues Synthesis and Antitumor Activity of Ring A- and F-Modified Hexacyclic Camptothecin Analogues Synthesis and Biological Evaluation of Novel A-Ring Modified Hexacyclic Camptothecin Analogues