Diterpene glycosides and phenolic compounds from the fruits of Xanthium strumarium

Abstract

Seven compounds including two diterpene glucosides atractyloside (1), carboxyatractyloside (2), and five phenolic compounds as 5‐O‐caffeoylquinic acid (3), 1,5‐di‐O‐caffeoylquinic acid (4), 2,3‐dihydroxy‐1‐(4(hydroxy‐3‐methoxyphenyl)‐propan‐1‐one (5), (erythro)‐1,2‐bis(4‐hydroxy‐3‐methoxyphenyl)‐1,3‐propandiol (6), and p‐hydroxybenzaldehyde (7) were isolated 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.