含氰衍生物作为竹笋商业产品认证的化学标志物,Journal of Agricultural and Food Chemistry

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含氰衍生物作为竹笋商业产品认证的化学标志物
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2021-08-23 , DOI: 10.1021/acs.jafc.1c02947
Guillermo F Padilla-González ₁ , Nicholas J Sadgrove ₁ , Abigail Rosselli ₁ , Moses K Langat ₁ , Rui Fang ₁ , Monique S J Simmonds ₁

Affiliation

市场上发现的竹笋的认证很复杂，因为加工和未加工材料的化学特征不同。在加工过程中，会产生具有潜在毒性的氰糖苷紫杉酚的热衍生物。在这里，我们报告了两种主要二芳基丁烯腈衍生物的分离和结构阐明，它们是竹笋商业提取物中罕见的 2,3-双（4-羟基苯基）丁-2-烯腈的顺式和反式异构体。这些在新鲜竹笋中不存在的化合物是通过煮沸普通竹笋产生的，并且与紫杉酚水平降低有关。此外，（E)-2,3-双(4-羟基苯基)but-2-eneditrile 在所有 16 种测试的商业产品中进行了量化。发现其丰度变化很大，保存的竹笋中的含量为 1 至 3 毫克/克，商业水提取物中的含量为 10 至 160 毫克/毫升。在 15 个经认证的竹子样品中，仅在B. vulgaris和Gigantochloa verticillata的枝条中发现了紫杉酚，它们代表了两种可食用的竹种。我们的研究结果表明，二芳基丁烯腈可作为鉴定从含紫杉酚的可食用物种和器官中提取的煮沸加工竹笋的标志物。

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Cyanogenic Derivatives as Chemical Markers for the Authentication of Commercial Products of Bamboo Shoots

The authentication of bamboo shoots found in the marketplace is complex because the chemical profile of processed and unprocessed material is different. During processing, heat derivatives of the potentially toxic cyanogenic glycoside taxiphyllin are produced. Here, we report the isolation and structure elucidation of the two major diarylbutenedinitrile derivatives, which are cis and trans isomers of the rare 2,3-bis(4-hydroxyphenyl)but-2-enedinitrile from a commercial extract of bamboo shoots. These compounds, absent in fresh bamboo shoots, were produced by boiling the shoots of Bambusa vulgaris and were associated with a decrease in levels of taxiphyllin. Furthermore, (E)-2,3-bis(4-hydroxyphenyl)but-2-enedinitrile was quantified in all 16 of the commercial products tested. Its abundance was found to be highly variable, ranging from 1 to 3 mg/g in preserved bamboo shoots and from 10 to 160 mg/mL in commercial aqueous extracts. Of the 15 authenticated bamboo samples tested for taxiphyllin, it was found only in the shoots of B. vulgaris and Gigantochloa verticillata, which represent two edible bamboo species. Our results indicate that diarylbutenedinitriles can be used as markers for the authentication of boil-processed bamboo shoots obtained from taxiphyllin-containing edible species and organs.

更新日期：2021-09-01

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