A new biflavone from needles of Taxus canadensis Determine resource chemical component in ginkgo pollen simultaneously by UPLC-TQ-MS Chemical constituents in twigs and leaves of Sabina pingii var. wilsonii Studies on chemical constituents of Selaginella stauntoniana (Ⅰ) A new biflavonoid from Selaginella uncinata Chemical constituents from Selaginella doederleinii and their bioactivities Chemical constituents in twigs and leaves of Sabina pingii var. wilsonii