Objective: To develop an efficient method for the separation of anthocyanins from Perilla frutescens.
Methods: Freeze-dried Perilla frutescens was extracted with 1% HCl. After purified by Amberlite XAD-7 column chromatography, the bioactive anthocyanins were separated by high-speed countercurrent chromatography (HSCCC). The structures of the compounds were elucidated by 1H- and 13C-NMR spectroscopy.
Results: When the HSCCC separation was performed with a two-phase solvent system composed of n-butanol-tert-butyl methyl ether-acentonitrile-water (2:2:1:5 + 0.1% TFA) by eluting the mobile phase at a flow rate of 3.0 mL/min and a revolution speed of 800 r/min, 10.1 mg malonylshisonin and 8.6 mg shisonin were obtained from 1.0 g of the XAD-7 extract. The purities of malonylshisonin and shisonin were 96.7% and 97.5%, respectively.
Conclusion: HSCCC is a fast and efficient technique to prepare pure malonylshisonin and shisonin from Perilla frutescens.
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