tokens: We have compared the action on U-937 human promonocytic leukemia cells of two DNA topoisomerase II inhibitors , namely the epipodophyllotoxin etoposide and the bisdioxopiperazine ICRF-193 .
folded_tokens: we have compared the action on u-937 human promonocytic leukemia cells of two dna topoisomerase ii inhibitors , namely the epipodophyllotoxin etoposide and the bisdioxopiperazine icrf-193 .
labels: O O O O O O B-cell_line I-cell_line I-cell_line I-cell_line I-cell_line O O B-protein_molecule I-protein_molecule I-protein_molecule O O O O B-other_organic_compound B-other_organic_compound O O B-other_organic_compound B-other_organic_compound O