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Two Antioxidant Alkaloids from Portulaca oleracea L.

✍ Scribed by Dianyu Liu; Tao Shen; Lan Xiang

Publisher
John Wiley and Sons
Year
2011
Tongue
German
Weight
166 KB
Volume
94
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Two alkaloids, oleraceins F and G, were isolated from Portulaca oleracea L., and their structures were determined as methyl (2__S__)‐6‐[(β‐D‐glucopyranosyl)oxy]‐2,3‐dihydro‐5‐hydroxy‐1‐[(2__E__)‐3‐(4‐hydroxy‐3‐methoxyphenyl)prop‐2‐enoyl]‐1__H__‐indole‐2‐carboxylate and methyl (2__S__)‐6‐[(β‐D‐glucopyranosyl)oxy]‐2,3‐dihydro‐5‐hydroxy‐1‐[(2__E__)‐3‐(4‐hydroxyphenyl)prop‐2‐enoyl]‐1__H__‐indole‐2‐carboxylate, based on their spectroscopic data. Oleraceins F and G exhibited scavenging activity against 1,1‐diphenyl‐2‐picrylhydrazyl (DPPH) radical, with EC~50~ values of 21.00 and 37.69 μM, respectively.

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