PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 21728961-4 2011 Quantitative structure-activity relationships of the ability of flavones, chalcones, xanthones, acridones and various benzopyrane/benzofurane derivatives to inhibit ABCG2-mediated drug efflux have led to pharmacophores and molecular models allowing to optimize the available hit compounds and to design new-generation lead compounds. Xanthones 85-94 ATP binding cassette subfamily G member 2 (Junior blood group) Homo sapiens 165-170