Extraction and isolation of 23-acetate alisol B from Alisma orientalis by supercritical fluid extraction and high-speed counter-current chromatography / 中草药

ABSTRACT

Objective: To develop an effective and rapid method for the preparation of 23-acetate alisol B from Alisma orientalis. Methods: The SFE-CO2 extract from A. orientalis was injected into high speed counter current chromatography (HSCCC) directly, and eluted with difierent solvent systems. The crystalline purity was detected by HPLC. The structure of the target compound was identified by UV, IR, MS, and NMR. Results: The solvent system composed of n-hexane-ethylacetate- methanol-water (3∶2∶3∶2) was the best. The lower phase was used as the mobile phase and performed at a flow rate of 2 m/min, while the apparatus rotated at 800 r/min, and detected at 254 nm. The prepared alisol B 23-acetate was identified with infrared spectrometry (IR), mass spectrometry (MS), and nuclear magnetic resonance (NMR) detection, and its purity was 99.8% analyzed by HPLC. Conclusion: The established method is relatively simple, fast, and suitable for the fast isolation and separation of alisol B 23-acetate.