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Two new dihydro- β -agarofuran sesquiterpenes chiapen T ( 1 ) and chiapen U ( 2 ), along with chiapen A ( 3 ), 1 β -hydroxy-2 β ,6 α ,12-triacetoxy-8 β -( β -nicotinoyloxy)-9 β -(benzoyloxy)- β -dihydroagarofuran ( 4 ), wilforlide B ( 5 ), 3-hydroxy-2-oxo-3-friedelen-29-oic acid ( 6 ), epikatonic acid ( 7 ), 22-epi-maytenfolic acid ( 8 ), maytenoic acid ( 9 ), wilforic acid F ( 10 ), wilforic acid B ( 11 ), were reported for the first time from the  Celastrus angulatus . The structures of all the compounds were elucidated by HR-ESI-MS, 1 D and 2 D NMR spectra, as well as single-crystal X-ray diffraction analyses. Compounds  1  and  2  were examined for anti-inflammatory activity, respectively. None of them showed potent activity.

Two new dihydro- β -agarofuran sesquiterpenes from the roots of Celastrus angulatus