Two Antioxidant Alkaloids from Portulaca oleracea L. |
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| Authors: | Dianyu Liu Tao Shen Lan Xiang |
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| Institution: | 1. School of Pharmacy, Shandong University, Jinan 250012, P.?R. China, (phone: +86‐531‐88382028;2. fax: +86‐531‐88382548) |
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| Abstract: | Two alkaloids, oleraceins F and G, were isolated from Portulaca oleracea L., and their structures were determined as methyl (2S)‐6‐(β‐D ‐glucopyranosyl)oxy]‐2,3‐dihydro‐5‐hydroxy‐1‐(2E)‐3‐(4‐hydroxy‐3‐methoxyphenyl)prop‐2‐enoyl]‐1H‐indole‐2‐carboxylate and methyl (2S)‐6‐(β‐D ‐glucopyranosyl)oxy]‐2,3‐dihydro‐5‐hydroxy‐1‐(2E)‐3‐(4‐hydroxyphenyl)prop‐2‐enoyl]‐1H‐indole‐2‐carboxylate, based on their spectroscopic data. Oleraceins F and G exhibited scavenging activity against 1,1‐diphenyl‐2‐picrylhydrazyl (DPPH) radical, with EC50 values of 21.00 and 37.69 μM , respectively. |
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| Keywords: | Portulaca oleracea Alkaloids Oleraceins F and G Antioxidant activity |
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