Synonyms: 2-Propenoicacid, 2-(hydroxymethyl)-,4-[(acetyloxy)methyl]-9-ethylidene-1a,1b,3,5,6,6a,8,9,9a,10,11,11a-dodecahydro-9a-hydroxy-6a,11a-dimethyl-3,8-dioxooxireno[9,10]cyclodeca[1,2-b:5,6-b']difuran-5-ylester, [1aR-(1aR*,1bS*,5S*,6aR*,9Z,9aR*,11aR*)]-;Oxireno[9,10]cyclodeca[1,2-b:5,6-b']difuran, 2-propenoic acid deriv.;Brachycalyxolide