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. 2019 Feb 14;15(2):24. doi: 10.1007/s11306-019-1486-5

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© The Author(s) 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 3 — Identifying the localization of rutin. A The localization of rutin was visualized with m/z 633.1425 ± 1.8111 as [M + Na]⁺ form on the cross section. Bar indicates 1 mm. B Comparing the relative signal intensity of rutin in liquid chromatography–tandem mass spectrometry. The signal intensity of rutin was divided with that of the internal standard lidocaine in each sample. Others include the vascular and ground tissues. Bar indicates standard deviation (n = 3)