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首页> 外文期刊>Journal of the Brazilian Chemical Society >Dereplication of glycosides from Sapindus saponaria using liquid chromatography-mass spectrometry
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Dereplication of glycosides from Sapindus saponaria using liquid chromatography-mass spectrometry

机译:液相色谱-质谱法从无患子中提取苷

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摘要

Fruits of Sapindus saponaria (Sapindaceae), a widespread tree throughout the tropics, were collected each 30 days during six months. Liquid-chromatography with UV and MS detection (LC/UV/ESI-MS) and MS/MS fragmentation studies showed that the main glycosides present in these fruits are saponins (SAP) derived from the triterpenes hederagenin and oleanolic acid, and acyclic sesquiterpene oligoglycosides (ASOGs). Using these methods of analysis, we detected up to thirty SAPs and sixty-three ASOGs. The plant produces these compounds as a complex mixture of naturally non-regiosselective acetylated glycosides. Alkaline hydrolysis of the natural glycosides produced simplified mixtures of compounds formed of only four SAPs and five ASOGs. Quantitative analysis of the saponificated glycosides showed that the amount of SAPs accumulated during fruit maturation was almost constant at ca. 110 mg g(-1) while the quantity of ASOGs are considerably higher and hits a maximum accumulation of ca. 540 mg g(-1) at an age of ca. 3 months.
机译:Sapindus saponaria(无患子科)的果实,在整个热带地区分布广泛,在六个月内每30天收集一次。带有UV和MS检测的液相色谱(LC / UV / ESI-MS)和MS / MS碎片研究表明,这些水果中存在的主要糖苷是衍生自三萜类二十二烯皂苷元和齐墩果酸的皂苷(SAP)和无环倍半萜烯低聚糖苷(ASOG)。使用这些分析方法,我们检测到多达30个SAP和63个ASOG。植物产生的这些化合物是天然的非区域选择性乙酰化糖苷的复杂混合物。天然糖苷的碱性水解产生仅由四个SAP和五个ASOG形成的化合物的简化混合物。皂化糖苷的定量分析表明,果实成熟过程中积累的SAP量几乎恒定在约。 110 mg g(-1),而ASOG的数量要高得多,并且达到最大累积量。约540 mg g(-1)。 3个月。

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