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Portion of ROESY spectrum recorded for the 11.4 mM solution, consisting of purine 4d and β-CD with a 1:1 molar ratio (D2O:DMSO-d6, 1:2, v:v; 303 K). The cross-peaks related to the intermolecular contacts inside the β-CD cavity are indicated by red stars. H2–H6 are H-atoms with glucose units of β-CD.
