supplementary material is available for this article at 10.1007/s13659 - 013 - 0074-z and is accessible for authorized users .
a new trijugin - type limonoid , cipatrijugin g ( 1 ) , together with the related known cipatrijugin a ( 2 ) , were isolated from the aerial parts of cipadessa cinerascens . 
 the structure of the new compound was determined by extensive analysis of its spectroscopic data and by comparison of its nmr data with those reported in the literature . 
 compound 1 showed cytotoxicity against tumor cell line a549 with an ic50 value of 9.78 m . 
 this is the first report of a trijugin - type limonoid bearing a -hydroxybutenolide unit , in comparison to the common furan unit as ring e. electronic supplementary materialsupplementary material is available for this article at 10.1007/s13659 - 013 - 0074-z and is accessible for authorized users .