2 NEW STYRYL LACTONES, 9-DEOXYGONIOPYPYRONE AND 7-EPI-GONIOFUFURONE, FROM GONIOTHALAMUS-GIGANTEUS

Two new styryl lactones, 9-deoxygoniopypyrone [1] and 7-epi-goniofufurone [3], and a known styryl lactone, goniodiol [5], were isolated from the stem bark of Goniothalamus giganteus. The structures were elucidated by ir, ms, H-1-nmr, C-13-nmr, and H-1-H-1 COSY spectra; the relative configurations were determined by X-ray crystallographic analysis. Unlike goniopypyrone [2] and goniofufurone [4], neither of the new styryl lactones 1 and 3 showed significant bioactivities to human tumor cells. However, goniodiol [5] showed significant and selective cytotoxicity against human lung tumor cells (A-549).