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Four new flavonol glycosides (1-4), hippophins C-F, together with one known flavonoid (5), were isolated from the seed residue of Hippophae rhamnoides subsp. sinensis. The chemical structures of these compounds were characterized by 1D and 2D NMR, and HR-ESI-MS data. This report is a continuous research work on the systematic chemical investigation of plants of the genus Hippophae in our laboratory.
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Gao et al. (2013) studied this question.
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