Panaxyne epoxide, a new cytotoxic polyyne fromPanax ginseng root against L1210 cells

A new polyacetylene compound with cytotoxic activity against L1210 cells having diyne-ene and epoxy moiety, named panaxyne epoxide, was isolated fromPanax ginseng C.A. Meyer. The chemical structure of the polyacetylene was determined to be tetradeca-13-ene-1,3-diyne-6,7-epoxide by UV, IR,1H-NMR,13C-NMR and mass spectra.