ABSTRACT Phenolic compounds and carotenoids profile of Amazonian Eryngium foetidum leaves and the quenching ability of their hydrophilic extract against singlet oxygen (1O2) were determined. Chlorogenic acid (4327 μg/g, dry basis, d.b.) was the major phenolic compound in the leaves at very high concentrations, while lutein (205 μg/g, d.b.) and β-carotene (161 μg/g, d.b.) were the major carotenoids. The extract of E. foetidum leaves was able to scavenge DPPH● (91.6% at 5 mg/mL), ABTS●+ (15.77 μM Trolox equivalent/g extract) and it exhibited high efficiency to protect tryptophan against 1O2, with IC50 at 343 μg/mL and 78% of protection at the highest tested concentration (625 μg/mL). Therefore, E. foetidum leaves can be exploited as an accessible natural source of bioactive compounds with antioxidant properties to be used by the food or pharmaceutical industries.

中文翻译：

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Amazonian Eryngium foetidum 叶子表现出非常高的生物活性化合物含量和高单线态氧猝灭能力

摘要 测定了亚马逊刺槐叶的酚类化合物和类胡萝卜素分布，以及它们的亲水提取物对单线态氧 (1O2) 的淬灭能力。绿原酸 (4327 μg/g, 干基, db) 是叶中浓度非常高的主要酚类化合物，而叶黄素 (205 μg/g, db) 和 β-胡萝卜素 (161 μg/g, db) 是叶中的主要酚类化合物。主要的类胡萝卜素。E. foetidum 叶提取物能够清除 DPPH●（5 mg/mL 时为 91.6%）、ABTS●+（15.77 μM Trolox 当量/g 提取物），并表现出高效保护色氨酸免受 1O2 的影响，IC50 为 343 μg/mL 和最高测试浓度 (625 μg/mL) 下的 78% 保护。因此，E。