Simultaneous determination of Eleutheroside B and Eleutheroside e in rat plasma by high performance liquid chromatography-electrospray ionization mass spectrometry and its application in a pharmacokinetic study Ma, B.; Zhang, Q.; Liu, Y.; Li, J.; Xu, Q.; Li, X.; Yang, X.; Yao, D.; Sun, J.; Cui, G.; Ying, H. Journal of Chromatography. B Analytical Technologies in the Biomedical and Life Sciences 917-918: 84-92 2013 1873-376X 10.1016/j.jchromb.2012.12.041 https://eurekamag.com/research/055/787/055787444.php