title: Antiplatelet aggregation principles from Ephemerantha lonchophylla.
abstract: Bioactivity-directed separation led to the identification of four compounds, viz. denbinobin (1), 3,7-dihydroxy-2,4-dimethoxyphenanthrene (2), 3-methylgigantol (3), and erianthridin (4) from the ethanolic extract of Ephemerantha lonchophylla. Antiplatelet tests were carried out using 4 different aggregation inducers, viz. arachidonic acid (AA), thrombin, collagen and platelet activating factor (PAF). The results indicated that only compounds 2, 3, and 4 exhibited generally significant anti-aggregation activities with that against AA-induced aggregation being most effective. Estimated IC50, values in this regard for 2, 3, and 4 were 24 microM, 30 microM and 9 microM, respectively.
authors.forename: C C
authors.initials: CC
authors.lastname: Chen
authors.forename: Y L
authors.initials: YL
authors.lastname: Huang
authors.forename: C M
authors.initials: CM
authors.lastname: Teng
mesh_terms: D008516:Medicine, Chinese Traditional; D010946:Plants, Medicinal / Q000737:chemistry*; D010975:Platelet Aggregation Inhibitors / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*
chemical_list: D010975:Platelet Aggregation Inhibitors