Synonyms: Cyclopenta[c]pyran-4-carboxylicacid, 6-[[[4-[2-(acetyloxy)ethyl]-3-ethenyl-2-(b-D-glucopyranosyloxy)-3,4-dihydro-2H-pyran-5-yl]carbonyl]oxy]-1-(b-D-glucopyranosyloxy)-1,4a,5,6,7,7a-hexahydro-7-methyl-,methyl ester, [1S-[1a,4aa,6a(2R*,3S*,4R*),7a,7aa]]-; Sylvestroside II