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. 2019 May 7;24(9):1767. doi: 10.3390/molecules24091767

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© 2019 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 (http://creativecommons.org/licenses/by/4.0/).

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(a) H-NMR spectrum of impurity X; (b) C-NMR spectrum of impurity X; (c) DEPT spectrum of impurity X; (d) gCOSY spectrum of impurity X; (e) gHSQC spectrum of impurity X; (f) gHMBC spectrum of impurity X.

(a) H-NMR spectrum of impurity X; (b) C-NMR spectrum of impurity X; (c) DEPT spectrum of impurity X; (d) gCOSY spectrum of impurity X; (e) gHSQC spectrum of impurity X; (f) gHMBC spectrum of impurity X.