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. 2020 Jul 21;34(12):3200–3210. doi: 10.1002/ptr.6767

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© 2020 John Wiley & Sons, Ltd.

This article is being made freely available through PubMed Central as part of the COVID-19 public health emergency response. It can be used for unrestricted research re-use and analysis in any form or by any means with acknowledgement of the original source, for the duration of the public health emergency.

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Quantitative analysis of rugosic acid A in R. rugosa extract. (a) Structure of rugosic acid A. (b) Calibration curve of rugosic aicd A standard. (c) HPLC chromatogram pattern of rugosic acid A in extract from hexan fraction of R.rugosa.; HPLC model: Agilent 1100series (Agilent), column: Phenomenex Luna C18 (5 μm, 4.6 × 250 mm), column temperature: 25°C, mobile phase: (a) H₂O, (b) ACN, gradient: 0–0, 5–0, 45–100, 65(min)‐100(B%) [Colour figure can be viewed at wileyonlinelibrary.com]