d w boritzki t j besserer j a and jackson r c in vitro strand scission and inhibition of nucleic acid synthesis on l1210 leukemia cells by a new class of dna complexes the anthra 1 9 cd pyrazol 6 2h ones anthrapyrazoles biochem pharmacol 34 3499 3508 1985 17 hsiang y h jiang j b and liu l f topoisomerase ii mediated dna cleavage by amonafide and its structural analogs mol pharmacol 36 371 376 1989 18 jalal m a f and collin h a polyphenols of mature plant seedling and tissue cultures of theobroma cacoa phytochemistry 6 1377 1380 1978 19 jeggo p a caldecott k pidsley s and banks g r sensitivity of chinese hamster ovary mutants defective in dna double strand break repair to topoisomerase ii inhibitors cancer res 49 7057 1989 20 kashiwada y nonaka g i nishioka i lee k j h bori i fukushima y bastow k f and lee k h tannin as potent inhibitors of dna topoisomerase ii in vitro j pharm sci 82 5 487 492 1993 21 kato r nakadate t yamamoto s and sugimura t inhibition of 12 0 tetradecanoylphorbol 13 acetate induced tumor promotion and ornithine decarboxylase activity by quercitin possible involvement of lipoxygenase inhibition carcinogenesis 4 1301 1305 1983 22 kawada s z yamashita y fujii n and nakano h induction of heat stable topoisomerase ii dna cleavable complex by nonintercalative terpenoids terpentecin and clerocidin.