Fluorescein lisicol is a fluorescent-labelled bile salt and a marker of hepatic biliary transporter function. Fluorescein lisicol can be used for metabolic research[1].
References
[1] de Mey C, et al. Effects of renal insufficiency on the elimination of fluorescein lisicol (NRL972), an investigational marker of hepatic transporter function. Int J Clin Pharmacol Ther. 2015 Jul;53(7):523-30. DOI:10.5414/CP202280