Chemical constituents from Viscum nudum and their accelerating PC12 cell differentiation Chemical constituents of antitumor active fraction of Lysimachia clethroides Chemical constituents of antitumor active fraction of Lysimachia clethroides Flavonoids from Ficus sarmentosa var.henryi Studies on the Chemical Constituents of Limonium aureum (L.) Hill Polyphenols from leaves of Olea europaea Polyphenols from leaves of Olea europaea