Experimental IR spectra and theoretical spectral absorption curves of the practically important biologically active steroid phytohormones (22S,23S)-24-epibrassinolide, (22S,23S)-28-homobrassinolide, and homobrassinolide, which have similar chemical structures, were compared and analyzed to establish spectral and structural correlations of them. This enabled an evaluation of the influence of side-chain structural features on the formation of IR spectra and the establishment of connections between their structural differences and the observed changes in the IR spectra in the range 1500–950 cm^–1.

中文翻译：

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多种不同侧链结构的芸苔素内酯的红外光谱计算与对比分析

对具有相似化学结构的实际重要的生物活性类固醇植物激素 (22S,23S)-24-表油菜素内酯、(22S,23S)-28-高油菜素内酯和高油菜素内酯的实验红外光谱和理论光谱吸收曲线进行了比较和分析建立它们的光谱和结构相关性。这使得能够评估侧链结构特征对 IR 光谱形成的影响，并在它们的结构差异与 1500-950 cm ^–1范围内观察到的 IR 光谱变化之间建立联系。