Synonyms: 3H-Cyclopenta[1,3]cyclopropa[1,2]benzene-6-aceticacid, 3a,3b,4,5,6,7-hexahydro-7-hydroxy-a,3a,3b-trimethyl-3-oxo-, g-lactone (6CI,7CI);3H-Cyclopenta[2,3]cyclopropa[1,2-g]benzofuran-3,7(6H)-dione,3a,3b,4,5,5a,8a-hexahydro-3a,3b,6-trimethyl-, (3aR,3bS,5aS,6S,8aS,8bR)- (9CI);3H-Cyclopenta[2,3]cyclopropa[1,2-g]benzofuran-3,7(6H)-dione,3a,3b,4,5,5a,8a-hexahydro-3a,3b,6-trimethyl-, [3aR-(3aa,3bb,5ab,6b,8aa,8bR*)]-;3H-Cyclopenta[2,3]cyclopropa[1,2-g]benzofuran-3,7(6H)-dione, 3a,3b,4,5,5aa,8ab-hexahydro-3ab,3ba,6a-trimethyl-, (-)- (8CI);(-)-Lumisantonin; Lumisantonin; NSC 125345