text: Uptake of the radiolabeled model substrates estradiol 17β-glucuronide, estrone 3-sulfate, and dehydroepiandrosterone sulfate (<< DHEAS >>) was determined in the absence and presence of compounds 1-6 using Chinese hamster ovary (CHO) cells stably expressing either [[ OATP1B1 ]] or OATP1B3.