Synonyms: 1,5-Methano-2H,8H-oxireno[1,8]cycloocta[1,2-f][2]benzopyran-4-aceticacid, a-(acetyloxy)-8-(3-furanyl)dodecahydro-3,3,5,7a-tetramethyl-10,13-dioxo-2-(1-oxopropoxy)-,methyl ester, [1R-[1a,2b,4a(R*),5a,5aa,7aa,8a,11aa,11bS*,12ab]]-; Swietemahonin B