Synonyms: 2-Butenoicacid, 4-hydroxy-2-(hydroxymethyl)-,2,3,3a,4,5,8,9,11a-octahydro-6,10-dimethyl-3-methylene-2-oxocyclodeca[b]furan-4-ylester, [3aR-[3aR*,4R*(E),6E,10E,11aR*]]-; Eupatoriopicrin (7CI);Germacra-1(10),4,11(13)-trien-12-oic acid, 6b,8a-dihydroxy-, 12,6-lactone, 4-hydroxy-2-(hydroxymethyl)crotonate (8CI);Crotonic acid, 4-hydroxy-2-(hydroxymethyl)-, 6-ester with6,8-dihydroxygermacra-3,9,11(13)-trien-12-oic acid 12,8-lactone (8CI);Cyclodeca[b]furan, 2-butenoic acid deriv.; Eupatoriopicrine