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首页> 外文期刊>Journal of Food Composition and Analysis >Flavanol-anthocyanin pigments in corn: NMR characterisation and presence in different purple corn varieties.
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Flavanol-anthocyanin pigments in corn: NMR characterisation and presence in different purple corn varieties.

机译：玉米中的黄酮-花青素色素：NMR表征和在不同紫色玉米品种中的存在。

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摘要

A flavanol-anthocyanin condensed pigment was isolated from a commercial anthocyanin-rich purple corn powder and its structure elucidated by mass spectrometry and 1H and 13C NMR using 1D and 2D techniques (COSY, HSQC, HMBC). The compound was unequivocally identified as the dimer catechin-(4 alpha rightwards-arrow 8)-cyanidin-3,5-O-diglucoside. In addition, six non-processed samples belonging to different corn varieties were analysed for their anthocyanin profiles, with the aim of checking if similar condensed pigments were present in native corn. The presence of condensed pigments was found in three corn varieties, whose identity was established from their UV and mass spectra and MS2 fragmentation patterns. The percentage of condensed pigments ranged between 0.3% and 3.2% of total anthocyanins. The whole of the observations made confirm that flavanol-anthocyanin condensed pigments can occur naturally in corn
机译：从市售的花青素丰富的紫色玉米粉中分离出黄烷醇-花青素缩合颜料，并通过质谱和1D和2D技术（COSY，HSQC，HMBC）通过质谱和1H和13C NMR阐明了其结构。明确地将该化合物鉴定为二聚体儿茶素-（4α右箭头8）-花青素-3,5-O-二葡糖苷。此外，对属于不同玉米品种的六个未加工样品的花色苷特性进行了分析，目的是检查天然玉米中是否存在类似的浓缩颜料。在三个玉米品种中发现了缩合颜料的存在，它们的身份是根据其紫外线和质谱以及MS2碎裂模式确定的。缩合颜料的百分比在总花青素的0.3％至3.2％之间。所做的全部观察结果证实，黄烷醇-花青素缩合色素可天然存在于玉米中

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