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Partial 1H NMR spectra (600 MHz, CDCl3, 298 K) of 819 knots 1, 2, and 3; (A) region 0.25–10.0 ppm. (B) Expanded regions 8.3–8.8 ppm. (C) Expanded regions 4.1–4.7 ppm. Residual solvent peaks are shown in gray. The lettering corresponds to the proton labeling in Fig. 1.
