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Molecules 2018, 23(2), 505; https://doi.org/10.3390/molecules23020505

Separation of Seven Polyphenols from the Rhizome of Smilax glabra by Offline Two Dimension Recycling HSCCC with Extrusion Mode

1
School of Pharmaceutical Sciences, Shandong University of Traditional Chinese Medicine, 4655 Daxue Road, Jinan 250355, China
2
Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
3
State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, 16 Nanxiaojie, Beijing 100700, China
4
Shandong Academy of Chinese Medicine, 7 Yanzishanxi Street, Jinan 250014, China
5
Shandong Key Laboratory of TCM Quality Control Technology, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), 19 Keyuan Street, Jinan 250014, China
*
Authors to whom correspondence should be addressed.
Received: 12 January 2018 / Revised: 20 February 2018 / Accepted: 22 February 2018 / Published: 24 February 2018
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Abstract

An offline two-dimensional recycling high-speed countercurrent chromatography (2D R-HSCCC) strategy with extrusion mode was developed for isolating polyphenols from the rhizome of Smilax glabra. Firstly, the ethyl acetate extract was divided into two fractions, Fr.1 and Fr.2, by silica gel column chromatography. Then, HSCCC was applied to separate polyphenols from the two fractions using a solvent system consisting of petroleum ether–ethyl acetate–methanol–water (1:3:0.5:5, v/v). Fifty milligrams of Fr.1 was separated by conventional HSCCC, yielding 5-O-caffeoylshikimic acid (1, 15.8 mg) and taxifolin (2, 4.8 mg). Offline 2D R-HSCCC with extrusion mode was used to separate Fr.2, and astilbin (4, 37.3 mg), neoisoastilbin (5, 8.8 mg), engeletin (7, 7.9 mg), and a mixture of two polyphenols were obtained from 100 mg of Fr.2. The mixture of two polyphenols was further separated by pre-HPLC, yielding neoastilbin (3, 15.2 mg) and isoastilbin (6, 9.9 mg). The purities of these seven compounds were all over 96.0%. Their structures were identified by MS and NMR. The results demonstrated that the strategy based on offline 2D R-HSCCC with extrusion mode was a powerful tool to separate the main compounds from the rhizome of Smilax glabra and valued for the preparative separation compounds with broad K-values and similar structures. View Full-Text
Keywords: Smilax glabra; polyphenols; separation; high speed countercurrent chromatography (HSCCC); recycling coupled extrusion mode Smilax glabra; polyphenols; separation; high speed countercurrent chromatography (HSCCC); recycling coupled extrusion mode
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Guo, W.; Dong, H.; Wang, D.; Yang, B.; Wang, X.; Huang, L. Separation of Seven Polyphenols from the Rhizome of Smilax glabra by Offline Two Dimension Recycling HSCCC with Extrusion Mode. Molecules 2018, 23, 505.

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