Stictic acid derivatives from the lichen Usnea articulata and their antioxidant activities

被引：82

作者：

Devehat, Françoise Lohézic-Le

Tomasi, Sophie

Elix, John A.

Bernard, Aurélie

Rouaud, Isabelle

Uriac, Philippe

Boustie, Joël

机构：

[1] Univ Rennes 2, Fac Pharm, Inst Chim Rennes, EA 4090 Subs Licheniques & Photoprotect, F-35043 Rennes, France

[2] Australian Natl Univ, Dept Chem, Canberra, ACT 0200, Australia

来源：

JOURNAL OF NATURAL PRODUCTS | 2007年 / 70卷 / 07期

关键词：

D O I：

10.1021/np070145k

中图分类号：

Q94 [植物学];

学科分类号：

071001 [植物学];

摘要：

Two new beta-orcinol depsidones, 1 and 2, together with 13 known compounds were isolated from the lichen Usnea articulata. The structures of 1 and 2 were elucidated by spectroscopic analyses and those of known compounds by comparison of their spectroscopic data with literature values or by direct comparison with authentic standards. Compounds 1, 2, and 5 exhibited moderate antiradical activity in the 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay. The depsidones 4 and 5 showed better superoxide anion scavenging activity (IC50 = 566 and 580 mu M, respectively) than quercetin (IC50 = 754 mu M).

引用

页码：1218 / 1220

页数：3

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