Emodin , a naturally occurring anthraquinone , exhibits an anticancer effect in various types of human cancer , including colon cancer ; however , the molecular mechanisms remain to be fully elucidated .
B-ChemicalEntity O O O O B-ChemicalEntity O O O O O O O O O B-OrganismTaxon B-DiseaseOrPhenotypicFeature O O B-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature O O O O O O O O O O O O