Evaluation of LC-MS chromatograms of pericarps from Illium species Chemical Constitutents from Tithonia diversifolia Allelopathic Sesquiterpene Lactones from Wedelia trilobata Identification of chemical component from Ixeris sonchifolia and its injection by HPLC-ESI-MSn Simultaneous determination of three sesquiterpene lactones in Radix Linderae by HPLC Studies on two sesquiterpene lactones of α-methylene-γ-olide from Artemisia tangutica by CD spectrum Study of sesquiterpene lactones in plants of chrysanthemum on inducible cytotoxicity and apoptosis of human nasopharyngeal carcinoma Simultaneous determination of five sesquiterpene lactones in Carpesium abrotanoides by HPLC Studies on sesquiterpene lactones from Carpesium faberi Chemical constituents from Xanthium mongolicum