Abstract Three novel cytotoxic squalene-type triterpenes, eurylene, 14-deacetyl eurylene and longilene peroxide, together with teurilene were isolated from the
Structure of a new cytotoxic squalene-type triterpene, named eurylene, from Eurycoma longifolia was elucidated by spectroscopic data, chemical evidence and X-ray analysis. The absolute stereostructure was determined by an advanced Mosher's method.