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首页> 外文期刊>Natural product research >Flavonoids from Jovibarba globifera (Crassulaceae) rosette leaves and their antioxidant activity
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Flavonoids from Jovibarba globifera (Crassulaceae) rosette leaves and their antioxidant activity

机译：柔叶玫瑰花莲叶中的类黄酮及其抗氧化活性

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摘要

Seven flavonoids new for the genus Jovibarba, kaempferol 1, kaempferol 3-O-galactopyranosyl-(1 → 2)-O-α-l-rhamnopyranoside 2, kaempferol 3-O-β-d-glucoside 3, kaempferol 3-O-α-l-rhamnopyranosyl-7-O-α-d-glucofuranosyl-(1 → 2)-O-α-l-rhamnopyranoside 4, kaempferol 3-O-β-d-glucopyranoside-7-O-α-l-rhamnopyranoside 5, kaempferol 3,7,4'-O-trimethyl ether 6 and quercetin 7, were isolated from fresh and dried leaves of J.ovibarba globifera subsp. globifera. The structures of these compounds were established by analysis of their spectroscopic (1H and 13C NMR) and spectrometric (MS) data, as well as by comparison of these with those reported in the literature. All of the flavonoids are reported for the first time from the investigated taxon. In addition the antioxidant activities in DPPH test of selected compounds were evaluated.
机译：Jovibarba属的七种新黄酮，山emp酚1，山fer酚3-O-吡喃并吡喃糖基-（1→2）-O-α-1-鼠李糖吡喃糖苷2，山ka酚3-O-β-d-葡萄糖苷3，山ka酚3-O- α-l-鼠李吡喃糖基-7-O-α-d-呋喃呋喃糖基-（1→2）-O-α-l-鼠李糖吡喃糖苷4，山萘酚3-O-β-d-吡喃吡喃糖苷-7-O-α-l-鼠李吡喃糖苷5，山emp酚3,7,4'-O-三甲醚6和槲皮素7是从新鲜的和干燥的叶圆柏亚种亚种中分离得到的。球状。这些化合物的结构是通过分析其光谱（1H和13C NMR）和光谱（MS）数据以及将其与文献报道的数据进行比较而建立的。从所研究的分类单元中首次报道了所有类黄酮。此外，还评估了所选化合物在DPPH测试中的抗氧化活性。

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