ABSTRACT
Objective: To study the chemical constituents in the whole herbs of Xanthium mongolicum. Methods: The chemical constituents were isolated and purified by chromatography on silica gel column and HPLC, and their structures were elucidated by spectral analysis. Results: Seventeen compounds were isolated and identified as lasidiol p-methoxybenzoat (1), β-selinene (2), xanthatin (3), xanthinosin (4), luteone (5), daucosterol (6), 4β,5β-epoxy xanthatin-1α,4α-endoperoxide (7), (6S,9R)-vomifoliol (8), dehydrovomifoliol (9), 3(Z)-hexenyl-β-D-glycoside (10), 4-oxo-bedfordia acid (11), 11α,13-dihydro-8-epi-xanfbut (12), scopolin (13), pinoresinol (14), β-sitosterol (15), quercetin (16), and methyl p-hydroxybenzonate (17). Conclusion: The compounds 2, 8, 9, 10, and 17 are isolated from the plants of Xanthium L. for the first time and the compounds 1, 5, 7, 11 and 13 are isolated from the whole herbs of X. mongolicum for the first time.