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(Left) 1H NMR spectra in the Hα region of 0.1 M solutions of 1–4 oligomers dissolved in CDCl3 at 25 °C. (Right) 1H NMR spectra in the Hα region of 0.1 M solutions of 1–4 oligomers dissolved in DMSO-d6 at 25 °C. Horizontal offset was added for clarity.
