Phytochemical investigation of the n-BuOH fraction of the 70% EtOH extract of Juglans sigillata green husks afforded a new isoflavone triglycoside, named 3′-methoxy-5′-hydroxy-isoflavone-7-O-(2″,6″-di-O-α-L-rhamnopyranosyl)-β-D-glucopyranoside (1), along with two known epimeric ellagitannins, pedunculagin (2) and 2,3-O-4,4′,5,5′,6,6′-hexahydroxydiphenoyl-(α/β)-glucose (3). Their structures were elucidated on the basis of spectroscopic analysis and chemical evidence.
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Acknowledgment
This research was funded by the Open Fund of State Key Laboratory of Tree Genetics and Breeding (Chinese Academy of Forestry) (Grant No. TGB2016002), Foundation of Jiangsu Provincial Key Laboratory of Pulp and Paper Science and Technology (201531), Nanjing Forestry University, China, State Key Laboratory of Pulp and Paper Engineering (South China University of Technology) (201611, 201211, 201451), National Natural Science Foundation of China (31501440).
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Published in Khimiya Prirodnykh Soedinenii, No. 5, September–October, 2017, pp. 737–739.
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Si, CL., Xie, DN., Sun, B. et al. A New Isoflavone Triglycoside from Green Husks of Juglans sigillata . Chem Nat Compd 53, 866–869 (2017). https://doi.org/10.1007/s10600-017-2142-9
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DOI: https://doi.org/10.1007/s10600-017-2142-9