tokens: These two anthracyclines , although closely related in their structures , appeared to act as differentiation inducers by distinct mechanisms .
folded_tokens: these two anthracyclines , although closely related in their structures , appeared to act as differentiation inducers by distinct mechanisms .
labels: O O B-other_organic_compound O O O O O O O O O O O O B-other_name I-other_name O O O O