Synonyms: 2H,6H,10H-Benzo[1,2-b:3,4-b':5,6-b'']tripyran-2-one,7,8,11,12-tetrahydro-12-hydroxy-6,6,10,11-tetramethyl-4-propyl-, [10S-(10a,11b,12b)]-; 2H,6H,10H-Benzo[1,2-b:3,4-b':5,6-b'']tripyran-2-one,7,8,11,12-tetrahydro-12a-hydroxy-6,6,10b,11a-tetramethyl-4-propyl- (8CI);Dihydro-(-)-calandolide B; Dihydrocostatolide; NSC 661123