Figure 9.

Aromatic and H(1′)/C(1′) ribose region of the contour plots of ¹H, ¹³C correlation spectra of N²,3-etheno-2-aminopurine riboside (5) in DMSO-d₆ (at ¹H frequency of 500 MHz, at 25 °C) showing the cross-peaks between the ribose and nucleobase nuclei. Contours are plotted: for HSQC (black), for 8 Hz optimized HSQMBC (red), and for 2 Hz optimized HSQMBC (blue). All peaks are marked at the center of the multiplet and labeled according to the assigned nuclei (Table 2).