In vivo pharmacokinetics of major bioactive components from Tanreqing Injection in rats Effect of Tanreqing Injection in various formula compatibilities on pharmacokinetics of main components Determination of Ursodeoxycholic Acid and Chenodeoxycholic Acidin Chinese Medicinal Compound Preparations by TLC-densitometry Rapid identification of two new isomers in bear bile powder by LC-Q-TOF-MS combined with PCC oxidation Determination of tauroursodeoxycholic acid in compound bile capsule by HPLC