Diterpene glycosides and phenolic compounds from the fruits of Xanthium strumarium

Their chemical structures were determined using ESI-MS, 1D NMR, and 2D NMR spectra as well as by comparison of the spectral data with those reported in the literature. Compounds 4 and 5 were reported from Xanthium genus for the first time. To our best knowledge, all these compounds were firstly reported from X. strumarium growing in Vietnam.