Xanthopurposide, A New Anthraglycoside from Rubia tinctorum Rhizomes

摘要

The new natural compound 3-hydroxy-1-O-[beta-D-xylopyranosyl-(1 -> 6)-beta-D-glucopyranosyl]-anthraquinone, which we called xanthopurposide, was isolated from rhizomes of Rubia tinctorum L. (madder). Its structure was elucidated using PMR, C-13 NMR, mass spectrometry, and UV spectroscopy.