Separation of five compounds from leaves of Andrographis paniculata (Burm. f.) Nees by off‐line two‐dimensional high‐speed counter‐current chromatography combined with gradient and recycling elution |
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| Authors: | Li Zhang Qi Liu Jingang Yu Hualiang Zeng Shujing Jiang Xiaoqing Chen |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, Central South University, Changsha, China;2. Collaborative Innovation Center of Resource‐conserving and Environment‐friendly Society and Ecological Civilization, Changsha, China |
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| Abstract: | An off‐line two‐dimensional high‐speed counter‐current chromatography method combined with gradient and recycling elution mode was established to isolate terpenoids and flavones from the leaves of Andrographis paniculata (Burm. f.) Nees. By using the solvent systems composed of n‐hexane/ethyl acetate/methanol/water with different volume ratios, five compounds including roseooside, 5,4′‐dihydroxyflavonoid‐7‐O‐β‐d ‐pyranglucuronatebutylester, 7,8‐dimethoxy‐2′‐hydroxy‐5‐O‐β‐d ‐glucopyranosyloxyflavon, 14‐deoxyandrographiside, and andrographolide were successfully isolated. Purities of these isolated compounds were all over 95% as determined by high‐performance liquid chromatography. Their structures were identified by UV, mass spectrometry, and 1H NMR spectroscopy. It has been demonstrated that the combination of off‐line two‐dimensional high‐speed counter‐current chromatography with different elution modes is an efficient technique to isolate compounds from complex natural product extracts. |
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| Keywords: | Andrographis paniculata (Burm. f.) Nees Gradient elution High‐speed counter‐current chromatography Recycling elution |
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