Triterpenes and triterpenoidal glycosides from the fruits of Ilex paraguariensis (Maté)
Triterpenes and triterpenoidal glycosides from the fruits of Ilex paraguariensis (Maté)
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DOI：
10.1590/s0103-50532004000200008
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发表时间：
2004-04-01
影响因子：
1.4
通讯作者：
Schenkel, Eloir P.
中科院分区：
文献类型：
--
作者：
Taketa, Alexandre T. C.;Breitmaier, Eberhard;Schenkel, Eloir P.
从巴拉圭冬青（Ilex paraguariensis）果实中分离得到一个新的三萜苷，命名为3 β-O-α-L-阿拉伯吡喃糖基rotundic acid（4），已知的三萜化合物有熊果酸（1）、乙酰熊果酸（2）、23-羟基熊果酸（3）、皂苷紫玉苷Ⅰ（5）和冬青苷Ⅱ（6）。通过1D和2D核磁共振波谱方法确定了它们的结构。同时测定了马黛茶甙和冬青甙Ⅱ的苦味阈值，并与冬青叶中的皂甙进行了比较。巴拉圭冬青和其他冬青属物种。冬青甙II是冬青果实中的主要皂甙之一，但在冬青叶中没有发现。paraguariensis的结果表明，在Mate生产中利用果实可以产生强烈的味道变化和未知的生理效应。
A new triterpenoid glycoside, 3beta-O-alpha-L-arabinopyranosyl rotundic acid, named here mateside (4), and the known triterpenes ursolic acid (1), acetylursolic acid (2), 23-hydroxyursolic acid (3), the saponins ziyu-glycoside I (5) and ilexoside II (6), were isolated from fruits of Ilex paraguariensis. Their structures were established on the basis of 1D and 2D NMR spectroscopic methods. The threshold bitterness values for mateside and ilexoside II were also determined and compared with saponins obtained from leaves of I. paraguariensis and other Ilex species. The high bitterness of Ilexoside II, one of the main saponins found the fruits, but not in the leaves of I. paraguariensis, suggests that the utilization of the fruits in the Mate production can produce a strong taste variation and unknown physiological effects.