berchemiosides ac 2acetoxyphenylpentaene fatty acid triglycosides from the unripe fruits of berchemia berchemiifolia three compounds in a new class of 2acetoxyphenylpentaene fatty acid triglycosides berchemiosides ac 13 and a biosynthetically related phenolic glycoside 4 were isolated from the unripe fruits of berchemia berchemiifolia along with three flavonoid 5odiglycosides 57 and three known flavonoids 810 their chemical structures including absolute configurations were determined by spectroscopic analysis in combination with chemical derivatization the pentaene group of 1 was found to have 6e8e10z12z14egeometry whereas those of 2 and 3 exhibited alle geometries the isolated compounds were examined for their cytotoxicity and xanthine oxidase xo inhibitory activity only compound 7 showed weak xo inhibitory activity