Synonyms: 24-Nor-16,17-secocholane-16,23-dioicacid, 11-(acetyloxy)-2,7,21-trihydroxy-4,8-dimethyl-1,17-dioxo-, g-lactone d-lactone, (2a,4a,5a,7a,11a,13a,14b,20R)-;Phenanthro[10,1-bc]pyran-5,11(1H,4H)-dione, 2,3,3ab,6ab,7,7aa,8,9,10,11a,11ba,11c-dodecahydro-1a,10a-dihydroxy-3a,8a,11ab,11cb-tetramethyl-3-(tetrahydro-5-oxo-3-furoyl)-, 1-acetate(8CI); Simarolide (7CI); 20(R)-Simarolide