Synthesis, Cytotoxicity, DNA Interaction, and Topoisomerase II Inhibition Properties of Novel Indeno[2,1-<i>c</i>]quinolin-7-one and Indeno[1,2-<i>c</i>]isoquinolin-5,11-dione Derivatives
topoisomerase II inhibition is found with (a) a cationic aminoalkylsidechain at the C-8 rather than at the C-9 position, (b) a dimethylaminoethoxy sidechain at the C-8 position introduced on the N-6 monosubstituted derivative, going with suppression of topoisomerase I poisoning, and (c) a dimethylaminoethyl rather than a dimethylaminopropyl sidechain at the N-6 position. The cytotoxicity was only partially