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. 2019 Feb 25;7:93. doi: 10.3389/fchem.2019.00093

Figure 3.

Figure 3

Fourier transform infrared spectroscopy analysis of functional groups of NIPAAm, DMAAm, UA, and PNDU-COOCH3. The characteristic peaks of NIPAAm, DMAAm, and UA can be seen in the spectrum of PNDU-COOCH3, which proved the successful synthesis.