One new triterpene glycoside 3-O--D-xylopyranosyl-(1→4)-[-D-glucopyranosyl-(1→3)]--D-xylopyranosyl-(1→4)--D-xylopyranosyl-(1→3)--Lrhamnopyranosyl-(1→2)--L-arabinopyranosyloleanolic acid, was isolated from Weigela x "kosteriana variegata" (Caprifoliaceae), with three known ones. Their structures were characterized by a combination of mass spectrometry and 1D and 2D NMR spectrocopic techniques including 1 Hand 13 C NMR, COSY, TOCSY, NOESY, HSQC, and HMBC experiments. The toxicological properties of some glycosides were determined with a zebrafish-based assay. The results show that the most active compounds were toxic to the larvae in the range of 1 M.

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