New Alkaloids and a Tetraflavonoid from <i>Cephalotaxus </i><i>w</i><i>ilsoniana</i> Li-Wen Wang Huey-Jen Su Sheng-Zehn Yang Shen-Jeu Won Chun-Nan Lin 10.1021/np0498657.s001 https://acs.figshare.com/articles/journal_contribution/New_Alkaloids_and_a_Tetraflavonoid_from_i_Cephalotaxus_i_i_w_i_i_ilsoniana_i_/3331312 A new homoerythrina alkaloid, C-3-epi-wilsonione (<b>1</b>), a new tetraflavonoid, taiwanhomoflavone C (<b>2</b>), and a new stereoisomer of desmethylcephalotaxinone (<b>3</b>) have been isolated from the leaves and heartwood of <i>Cephalotaxus wilsoniana</i>, respectively. The structures were elucidated by spectroscopic methods. Compound <b>1</b> showed cytotoxic activity against a number of human cancer cell lines in vitro. 2004-07-23 00:00:00 cancer cell lines stereoisomer desmethylcephalotaxinone taiwanhomoflavone C New Alkaloids Tetraflavonoid cytotoxic activity Cephalotaxus wilsoniana homoerythrina alkaloid spectroscopic methods tetraflavonoid Compound 1 heartwood