A new polyacetylenic diepoxide compound, gummiferol [1] was isolated f
rom the leaves of Adenia gummifera by KB cytotoxicity-guided fractiona
tion. Compound 1 exhibited significant activity against the KB human c
ell line and a broad cytotoxic spectrum against other human cancer cel
l lines. The structure of 1 was established primarily on the basis of
its spectral data.