Aglinin A (1) is a mixture of C₂₄-epimeric 20S,24-epoxy-24,25-dihydroxy-3,4-secodammar-4(28)-en-3-oic acid and present in plants of the family Meliaceae. The two epimers of 1 were resolved through an acetonide reaction, and the absolute configurations of two derivatives were deduced by the analysis of their ¹³C NMR differences induced by γ-gauche or steric effect. Based on it, the ¹³C NMR assignment of 24R-1 and 24S-1 was also established.

中文翻译：

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凝集素A差向异构体的分辨率及其NMR归属。

Aglinin A（1）是C _24-异构体20 S，24-环氧-24,25-二羟基-3,4-secodammar-4（28）-en-3-oic酸的混合物，存在于该科植物中科。的两个差向异构体1是通过丙酮化物反应解决，两种衍生物的绝对构型通过它们的分析推导出^13个由γ-诱导的C NMR差异笨拙或位阻效应。基于此，还建立了24 R - 1和24S - 1的¹³ C NMR分配。