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Squadinorlignoside: A Novel 7,9′-Dinorlignan from the Stems of Annona squamosa

✍ Scribed by Yu-Liang Yang; Fang-Rong Chang; Yang-Chang Wu

Publisher
John Wiley and Sons
Year
2005
Tongue
German
Weight
134 KB
Volume
88
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Two new polar lignans, i.e., squadinorlignoside (= 4‐[(1__E__)‐1‐(hydroxymethyl)‐3‐(4‐hydroxyphenyl)prop‐1‐en‐1‐yl]phenyl β‐D‐glucopyranoside; 1) and (6__R__,7__R__,8__S__)‐7a‐[(β‐D‐glucopyranosyl)oxy]‐1‐methoxyisolariciresinol (2) were isolated from the stems of Annona squamosa, together with eight known lignans and five known neolignans (compounds 3–15; Fig. 1). All of these constituents are reported for the first time from the genus Annona. The structures, absolute configurations, and selected conformational aspects of the new compounds were elucidated spectroscopically. Compound 1 is the first example of a 7,9′‐dinorlignan natural product.

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