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New α-Tetralone Galloylglucosides from the Fresh Pericarps of Juglans sigillata

✍ Scribed by Qing Liu; Ping Zhao; Xing-Cong Li; Melissa R. Jacob; Chong-Ren Yang; Ying-Jun Zhang

Publisher
John Wiley and Sons
Year
2010
Tongue
German
Weight
179 KB
Volume
93
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Three new α‐tetralone galloylglucosides, 1–3, were isolated from the fresh pericarps of Juglans sigillata (Juglandaceae), together with six known compounds. The structures of the new compounds were determined as 1,2,3,4‐tetrahydro‐7‐hydroxy‐4‐oxonaphthalen‐1‐yl 6‐O‐[(3,4,5‐trihydroxyphenyl)carbonyl]‐β‐D‐glucopyranoside (1), (1__S__)‐1,2,3,4‐tetrahydro‐8‐hydroxy‐4‐oxonaphthalen‐1‐yl 6‐O‐[(3,4,5‐trihydroxyphenyl)carbonyl]‐β‐D‐glucopyranoside (2), and 1,2,3,4‐tetrahydro‐7,8‐dihydroxy‐4‐oxonaphthalen‐1‐yl 6‐O‐[(3,4,5‐trihydroxyphenyl)carbonyl]‐β‐D‐glucopyranoside (3), respectively, on the basis of detailed spectroscopic analyses, and acidic and enzymatic hydrolysis. The antimicrobial activities of the isolated compounds 2, 4, and 7–9 were evaluated.

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