2H-Pyran-4-aceticacid, 2-(b-D-glucopyranosyloxy)-3,4-dihydro-3-(2-hydroxyethylidene)-5-(methoxycarbonyl)-,2-[4-[2-[2-(3,4-dihydroxyphenyl)ethoxy]-2-oxoethyl]-2-(b-D-glucopyranosyloxy)-5-(methoxycarbonyl)-2H-pyran-3(4H)-ylidene]ethylester, [2S-[2a,3E(2R*,3E,4R*),4b]]-; Jasamplexoside C