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. 2017 Oct 24;12:572. doi: 10.1186/s11671-017-2324-1

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© The Author(s). 2017

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. 2 — ¹H NMR spectra of CS, MTX, and CS-MTX. a ¹H NMR spectra of CS; CS was dissolved in D₂O. b ¹H NMR spectrum of MTX; MTX was dissolved in dimethyl sulfoxide-d6. c ¹H NMR spectrum of CS-MTX; CS-MTX was dissolved in D₂O