Synonyms: 10bH-Germacra-2,4,11(13)-trien-12-oicacid, 3,10-epoxy-6a,8b-dihydroxy-1-oxo-, 12,6-lactone,methacrylate (8CI); 2-Propenoic acid, 2-methyl-,(3aR,4R,6R,10Z,11aR)-2,3,3a,4,5,6,7,11a-octahydro-6,10-dimethyl-3-methylene-2,7-dioxo-6,9-epoxycyclodeca[b]furan-4-ylester (9CI); 2-Propenoic acid, 2-methyl-,2,3,3a,4,5,6,7,11a-octahydro-6,10-dimethyl-3-methylene-2,7-dioxo-6,9-epoxycyclodeca[b]furan-4-ylester, [3aR-(3aR*,4R*,6R*,10Z,11aR*)]-; 6,9-Epoxycyclodeca[b]furan, 2-propenoicacid deriv.; Calaxin