tokens: Hydroxyurea ( HU ) is an antitumor agent which also induces hemoglobinization during erythroid differentiation .
folded_tokens: hydroxyurea ( hu ) is an antitumor agent which also induces hemoglobinization during erythroid differentiation .
labels: B-other_organic_compound O B-other_organic_compound O O O B-other_name I-other_name O O O B-other_name O B-other_name I-other_name O