Chemical constituents from the stems of Celastrus orbiculatus

AimTo investigate the chemical constituents from the stems of Celastrus orbiculatus Thunb.MethodsThe chemical constituents were isolated and purified by silica gel, Sephadex LH-20 and ODS column chromatography. Their structures were elucidated on the basis of physical characteristics and spectral data.ResultsEleven compounds were obtained and their structures were identified as 3β-hydroxy-2-oxoolean-12-ene-22, 29-lactone (1), 2, 6-dimethoxybenzoquinone (2), 3-oxoolean-12-en-28-oic acid (3), 3-oxo-24-norolean-12-en-28-oic acid (4), 23-hydroxybetulonic acid (5), vanillic acid (6), 23-hydroxy-3-oxoolean-12-en- 28-oic acid (7), syringic acid (8), oleanolic acid (9), β-sitosterol (10), β-daucosterol (11).ConclusionCompound 1 is a new triterpene; compounds 2-5 and 7 were isolated from this genus for the first time and compounds 8 and 9 were firstly isolated from this plant.