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. 2024 Jan 19;16(2):305. doi: 10.3390/nu16020305

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© 2024 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Qualification and quantification of primary compounds in the Polygonum cuspidatum (Pc) water extract and microbe complex-fermented Polygonum cuspidatum (McPc). (A) Ultra-high performance liquid chromatogram of McPc and Pc. (B) Identification of 10 compounds in Pc and McPc. (C) High-performance liquid chromatogram (HPLC) for quantitative anthraquinones in Pc and McPc. (D) HPLC for quantitative stilbenes in Pc and McPc. (E) Total anthraquinone and stilbene contents of the primary compounds in the stem of Pc.