The stereospecific structure of triacylglycerols (TAGs) affects the bioavailability of fatty acids. Lack of enantiopure reference compounds and effective enantiospecific methods have hindered the stereospecific analysis of individual TAGs. Twelve novel enantiostructured AAB-type TAGs were synthesized containing one of the three n-3 polyunsaturated fatty acid: α-linolenic acid (ALA), eicosapentaenoic acid (EPA), or docosahexaenoic acid (DHA) in sn-1 or sn-3 position. These compounds formed six enantiomer pairs, which were separated with recycling high-performance liquid chromatography using chiral columns and UV detection. The chromatographic retention behavior of the enantiomers and the stereospecific elution order were studied. The enantiomer with an n-3 PUFA in the sn-1 position eluted faster than the enantiomer with the n-3 PUFA in the sn-3 position, regardless of the carbon chain length and number of double bonds of the PUFA. TAG enantiomers containing DHA exhibited highly different retention on the chiral column and were separated after the first column, whereas recycling was needed to separate the enantiomer pairs containing ALA or EPA. The system using two identical columns and one mobile phase, without sample derivatization, proved to be very effective also for peak purity assessment, confirming the enantiopurity of the synthesized structured TAGs being higher than 98 % (96 % ee).

三酰基甘油（TAGs）的立体特异性结构影响脂肪酸的生物利用度。缺乏对映纯参考化合物和有效的对映特异性方法阻碍了单个TAG的立体特异性分析。合成了十二个新颖的对映体结构AAB型TAG，它们在sn -1或sn -3位置包含以下三个n-3多不饱和脂肪酸之一：α-亚麻酸（ALA），二十碳五烯酸（EPA）或二十二碳六烯酸（DHA）。这些化合物形成了六对对映异构体，使用手性柱和紫外检测器通过循环高效液相色谱进行分离。研究了对映异构体的色谱保留行为和立体特异性洗脱顺序。sn中n-3 PUFA的对映体n-1 PUFA在sn -3位置时，-1位的洗脱速度比对映异构体快，而与PUFA的碳链长度和双键数目无关。含有DHA的TAG对映异构体在手性色谱柱上表现出截然不同的保留，并且在第一根色谱柱后被分离，而需要回收以分离含有ALA或EPA的对映异构体对。使用两个相同的色谱柱和一个流动相且没有样品衍生化的系统证明对峰纯度评估也非常有效，证实了合成结构化TAG的对映体纯度高于98％（96％ee）。