Fig. 4. Cross peaks scheme obtained from NOESY NMR spectra. (a) NOE signals for trans-1 (2.9 mM in methanol-d₃) at rt. (b) NOE signals for cis-1 (2.9 mM in methanol-d₃) at 5 °C. Red lines indicate intra-strand cross peaks and blue lines indicate inter-strand cross peaks. See ESI† for the spectra.