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Components of the ethylacetate extract of <Emphasis Type="Italic">Hedysarum theinum</Emphasis> roots
I. V. Nechepurenko N. P. Polovinka O. I. Sal’nikova L. M. Pokrovskii N. I. Komarova N. F. Salakhutdinov S. B. Nechepurenko 《Chemistry of Natural Compounds》2007,43(1):5-9
Isoflavonoids (-)-medicarpin, (-)-vestitol, and formononetin and butylphenols raspberry ketone and rhododendrol were isolated
for the first time from the ethylacetate extract of Hedysarum thienum roots by column chromatography. GC-MS showed that the ethylacetate extract contained fatty acids, the principal ones being
palmitic, linoleic, oleic, behenic, and lignocerinic.
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Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 6–9, January–February, 2007. 相似文献
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采用超高效液相色谱结合荧光检测建立了美白化妆品中杜鹃醇的分析方法,并采用液相色谱-串联质谱法进行确证。化妆品试样以5%三氯乙酸-乙腈混合溶液(70∶30)超声提取15 min,离心过膜后,采用通用型的反相C18色谱柱进行分离,以0.1%甲酸水-乙腈(75∶25)为流动相,荧光检测器(λex/λem=280nm/315 nm)检测,外标法定量;质谱确证采用水(含0.01%氨水)和乙腈作为流动相梯度洗脱,电喷雾负离子模式电离,多反应监测模式检测。结果显示,杜鹃醇在0.05~1.0 mg/L范围内线性关系良好,相关系数为0.999 6,方法的定量下限为2.5 mg/kg。面膜、乳霜、乳液和爽肤水等样品在加标浓度为5.0,10,25 mg/kg时的回收率为86.5%~103.4%,RSD(n=6)为1.1%~3.4%。该方法简便、灵敏,加标回收率和重现性良好,可用于化妆品中杜鹃醇的检测及其含量水平的普查。 相似文献
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Asymmetric Synthesis of (R)‐(−)‐Rhododendrol,the Aglycone of the Hepatoprotective Agent Rhododendrin
Abstract Starting from 2,3‐O‐isopropylidene‐D‐glyceraldehyde (3) as chiral material, (R)‐(?)‐rhododendrol 2, the aglycone of the naturally occurring rhododendrin 1 was synthesized. 相似文献
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