supplementary material is available for this article at 10.1007/s13659 - 012 - 0040 - 1 and is accessible for authorized users .
 five new mexicanolide - type limonoids , heytrijunolides a  
 e ( 15 ) were isolated from the branches and leaves of heynea trijuga . 
 the structures of these new compounds were elucidated on the basis of extensive spectroscopic analysis . 
 compound 3 showed weak cytotoxicity against hl-60 , smmc-7721 and a-549 human tumor cell lines with the ic50 values of 21.88 , 20.66 and 12.70 m , respectively . 
 electronic supplementary materialsupplementary material is available for this article at 10.1007/s13659 - 012 - 0040 - 1 and is accessible for authorized users . 
Electronic Supplementary Material
Electronic supplementary material