Synonyms: Germacra-1(10),4-diene-12,14-dioicacid, 2b,6a,8a-trihydroxy-, 12,6:14,2-dilactone, methacrylate, (E)- (8CI);7H-9,6-Methenofuro[2,3-f]oxacycloundecin, 2-propenoic acid deriv.; Methacrylicacid, 8-ester with 2b,6a,8a-trihydroxygermacra-1(10),4-diene-12,14-dioic acid di-g-lactone, (E)- (8CI);Deoxydihydroelephantopin; Dihydrodeoxyelephantopin; Elephantopin, deoxydihydro-