CHEMISTRY OF FIJIAN PLANTS - 13 - FLORIBUNDAL, A NONGLYCOSIDIC BISIRIDOID, AND 6 NOVEL FATTY ESTERS OF DELTA-AMYRIN FROM SCAEVOLA-FLORIBUNDA

Floribundal (1), the first example of a nonglycosidic bisiridoid has b een isolated from the heartwood of Scaevola floribunda and its structu re and relative stereochemistry determined by NMR spectroscopy and mol ecular modelling. The aglycon 2 of loganin was also isolated. A mixtur e of six novel delta-amyrin fatty esters with C-20-C-30 acid moieties (7-12) were isolated from the bark of S. floribunda and their structur es elucidated by NMR and HRMS of the parent compounds and their hydrol ysis products. The bark also contains the triterpenes delta-amyrin (13 ) and delta-amyrin acetate (14), and ursolic acid acetate, betulinic a cid, and betulin.