Studty on alkaloids in Lobelia sessilifolia by ESI-MSn HPLC-ESI-MSn analysis of chemical constituents in Semen Ziziphi Spinosae Analysis on active components alignment in dried seedling of Aconitum kusnezoffii by ESI-MS~n Relationship Between the Composition of Anthocyanins and Flower Color Variation in Hardy Water Lily (Nymphaea spp.) Cultivars HPLC-ESI-MSn analysis of chemical constituents in Semen Ziziphi Spinosae Identification of ginsenosides from Panax quinquefolius in Xinyue Capsula by LC-ESI-MS~n Flavonoid compounds in the petals of Hosta Identification of chemical component from Ixeris sonchifolia and its injection by HPLC-ESI-MSn Mechanisms of catalpol and jasminoidin by electrospray ionization mass spectrometry Lipo-alkaloids in Sini Decoction stemmed from ester-exchange reactions