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2D 13C–13C ssNMR spectra using 25 ms DARR mixing, providing 1–2 bond transfers. Measurement on samples (a) p1 and (b) p2 are shown; both obtained at 600 MHz 1H frequency and 8 kHz MAS at 283 K. Aliphatic-to-carbonyl (left) as well as intra-aliphatic (right) spectral regions are shown.
