A new triterpenoid and a new flavonoid glycoside isolated from Bupleurum marginatum and their anti-inflammatory activity.
This study to investigate chemical constituents from the aerial of Bupleurum marginatum led to the isolation of a new trierpenoid and a new flavonoid, namely 3β-hydroxy-cycloart-24-en-26-acetyloxy (1), and 3, 3', 5'-trimethoxyl-myricetin 7-O-β-D-glucopyranoside (2) along with eight known compounds (3-10). Their structures were established by spectral data analyses (MS, 1D and 2D NMR), as well as by comparison of spectral data with those of the related known compounds. The 24-en-lanostane type triterpenoid with a cyclopropane ring (1 and 3) was firstly reported from this specie, which might be chemotaxonomic markers of this specie. In addition, compounds 1 and 2 were examined for their anti-inflammatory activity. Compounds 1 and 2 inhibited the NF κB induction by 60.61% and 24.30%.