A new caffeoylated galloyl glucoside, 1,3-di-O-galloyl-6-O-trans-caffeoyl-β-D-glucoside (1), was isolated and purified, together with three known galloyl glucosides, 1,2,4,6-tetra-O-galloyl-β-D-glucoside (2), 1,2,6-tri-O-galloyl-β-D-glucoside (3), and 1,2,3,4,6-penta-O-galloyl-β-D-glucoside (4), from the leaves of Juglans sigillata. Chemical structures of the compounds were mainly established on the basis of spectroscopic methods, including 1D and 2D NMR and MS analyses.
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Acknowledgment
This research was funded by the State Key Laboratory of Tree Genetics and Breeding (Northeast Forestry University) (No. K2013101), the State Key Laboratory of Pulp and Paper Engineering (201611), Jiangsu Province Biomass Energy and Materials Laboratory in the Institute of Chimical Industry of Forest Products, CAF (JSBEM201601), the National Natural Science Foundation of China (No. 31170541), and the Natural Science Foundation of Tianjin City (No. 13JCZDJC29400).
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Published in Khimiya Prirodnykh Soedinenii, No. 6, November–December, 2016, pp. 866–868.
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Si, CL., Fan, S. & An, LL. Secondary Metabolites from the Leaves of Juglans sigillata . Chem Nat Compd 52, 1008–1010 (2016). https://doi.org/10.1007/s10600-016-1848-4
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DOI: https://doi.org/10.1007/s10600-016-1848-4