. 2017 Aug 31;22(9):1438. doi: 10.3390/molecules22091438
© 2017 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/).
Figure 3.
31P-NMR spectra of chitosan derivatives.