Synonyms: 1,5-Methano-2H,8H-oxireno[1,8]cycloocta[1,2-f][2]benzopyran-4-aceticacid,8-(3-furanyl)dodecahydro-3,3,5,7a-tetramethyl-2-[(2-methyl-1-oxo-2-butenyl)oxy]-10,13-dioxo-,methyl ester, [1R-[1a,2b(E),4a,5a,5aa,7aa,8a,11aa,11bS*,12ab]]-;1,5-Methano-2H,8H-oxireno[1,8]cycloocta[1,2-f][2]benzopyran-4-acetic acid,8-(3-furanyl)dodecahydro-3,3,5,7a-tetramethyl-2-[[(2E)-2-methyl-1-oxo-2-butenyl]oxy]-10,13-dioxo-,methyl ester, (1R,2R,4S,5S,5aR,7aR,8R,11aR,11bS,12aR)- (9CI); Swietemahonolide