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Two Antioxidant Alkaloids from Portulaca oleracea L.
Author(s) -
Liu Dianyu,
Shen Tao,
Xiang Lan
Publication year - 2011
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.201000250
Subject(s) - portulaca , chemistry , dpph , indole test , carboxylate , antioxidant , stereochemistry , organic chemistry , traditional medicine , medicine
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 μ M , respectively.