Synonyms: 2H-Cyclohepta[b]furan-2-one,3,3a,4,7,8,8a-hexahydro-7-methyl-3-methylene-6-(3-oxo-1-butenyl)-,(3aR,7S,8aS)- (9CI); 2H-Cyclohepta[b]furan-2-one,3,3a,4,7,8,8a-hexahydro-7-methyl-3-methylene-6-(3-oxo-1-butenyl)-, [3aR-(3aa,7b,8ab)]-; 3-Cycloheptene-1-acetic acid, 7-hydroxy-5-methyl-a-methylene-4-(3-oxo-1-butenyl)-, g-lactone (7CI); Xanthatin (6CI)