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. 2014 Jan 24;9:695–710. doi: 10.2147/IJN.S55255

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© 2014 Cheng et al. This work is published by Dove Medical Press Limited, and licensed under Creative Commons Attribution – Non Commercial (unported, v3.0) License

The full terms of the License are available at http://creativecommons.org/licenses/by-nc/3.0/. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed.

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IR spectra and ¹H-NMR of GA-CTS.

Notes: (A) The mass spectrum of GA-CTS, amide bond was formed by carboxylic acid group of GA and the amino group of CTS. (B) ¹H-NMR of GA-CTS showing that GA was connected to CTS. (a) ¹H-NMR of CTS. (b) ¹H-NMR of GA. (c) ¹H-NMR of GA-CTS. (d) Molecular formula of GA-CTS.

Abbreviations: ¹H-NMR, Hydrogen-1 nuclear magnetic resonance; CTS, chitosan; GA, glycyrrhetinic acid; GA-CTS, glycyrrhetinic acid-modified chitosan; IR, infrared; ppm, parts per million.