Chemical constituents from Vitex negundo Chemical constituents from effective fraction of leaves of Microcos paniculata with protection on acute myocardial ischemia injury Chemical constituents from roots of Millettia speciosa Isolation and expression analysis of caffeoyl CoA O-methyltransferase gene in Dendrobium officinale Determination of eight components in Lonicerae Japonicae Flos by HPLC Chemical constituents in Swertia davidi Research on quality control method for Juhuang Oral Liquid Caffeic acids from roots of Arctium lappa and their neuroprotective activity