Simultaneous determination of danshensu, rosmarinic acid, cryptotanshinone, tanshinone IIA, tanshinone I and dihydrotanshinone I by liquid chromatographic–mass spectrometry and the application to pharmacokinetics in rats - Liu, Y; Li, X; Li, Y; Wang, L; Xue, M (J Pharm Biomed Anal, 2010)