Synonyms: 2-Propenoicacid, 2-methyl-,2,3,3a,4,5,9,10,12a-octahydro-11-methyl-3-methylene-2,7-dioxo-7H-9,6-methenofuro[2,3-f]oxacycloundecin-4-ylester, [3aR-(3aR*,4S*,9R*,11E,12aR*)]-;Germacra-1(10),4,11(13)-triene-12,14-dioic acid, 2b,6a,8a-trihydroxy-, 12,6:14,2-dilactone,methacrylate, (E)- (8CI); 7H-9,6-Methenofuro[2,3-f]oxacycloundecin, 2-propenoicacid deriv.; Methacrylic acid, 8-ester with 2b,6a,8a-trihydroxygermacra-1(10),4,11(13)-triene-12,14-dioicacid di-g-lactone, (E)- (8CI);Deoxyelephantopin; Elephantopin, deoxy-; NSC 259726