Synonyms: 2H-Cyclohepta[b]furan-2-one,3,3a,4,7,8,8a-hexahydro-6-(1-hydroxy-3-oxobutyl)-7-methyl-3-methylene-,acetate, (3aR,7S,8aR)- (8CI); 2H-Cyclohepta[b]furan-2-one,6-[1-(acetyloxy)-3-oxobutyl]-3,3a,4,7,8,8a-hexahydro-7-methyl-3-methylene-,[3aR-[3aa,6(R*),7b,8aa]]-; Xanthumin (7CI)