Eudesmanolides and other terpenoids from Trattinickia rhoifolia

Three eudesmanolides, 8 ,9a-dihydroxyeudesma-4(15),7(11)-dien-12,8-olide (1), 8a,9a-epoxyeudesma-4(15), 7(11)-dien-12,8-olide (2), and 8,8'-bis[eudesma-4 (15),7(11) -dien-12,8 -olide] (3), together with seventeen known compounds were isolated from the resin of Trattinickia rhoifolia. The structures of the compounds were elucidated by spectroscopic data interpretation and molecular modeling analysis.