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. Author manuscript; available in PMC: 2015 Jan 17.
Published in final edited form as: J Org Chem. 2014 Jan 7;79(2):711–719. doi: 10.1021/jo402500a

Figure 5.

Figure 5

Representative 1H NMR (500 MHz, 25 °C, 5% d6-DMSO in CDCl3) titration data for 1a with 6. Graph of the change in N-H chemical shift with changing concentrations of (a) 5 and (b) 6 in the presence of 3a.