Studies on chemical constituents of Verbena officinalis Chemical constituents from Cardamine leucantha Studies on chemical constituents of Rabdosia serra Diterpenoids from Aquilariae Lignum Resinatum (Ⅲ) Chemical constituents from stems of Cipadessa cinerascens Chemical constituents in stems of Neocinnamomum delavayi Chemical constituents of n-butanol fraction from Patrinia scabra The Chemical Constituents of Amoora yunnanensis Chemical constituents from roots of Sambucus williamsii (I)