Phytochemical study of the hexane fruits peel extract Lansium domesticum contributed to discovery onoceranoid-type triterpene, onoceradienedione 1. The structure isolated compound was done by advance spectroscopic techniques, comprising IR, UV, 1D, 2D NMR and HR-ESI-MS spectra data. Moreover, 1 were examined for their cytotoxic activity against HeLa, T47D, A549 cells. results revealed significa...