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. 2019 Nov 5;24(21):4004. doi: 10.3390/molecules24214004

Figure 5.

Figure 5

NMR study of equimolar solution of GVL and PIP under MW at 90 °C for 1 h. Left part explains the 1H-NMR whereas the bottom right side of the figure shows the 13C-NMR with an expansion of the 10–50 ppm region in the top right corner.