PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 21991256-3 2011 In a previous study, we identified five natural coumarin potentiators of DeltaF508-CFTR including osthole, imperatorin, isopsoralen, praeruptorin A, and scoparone. imperatorin 107-118 CF transmembrane conductance regulator Rattus norvegicus 83-87