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Examples of NMR spectra used in the determination of heteronuclear long-range coupling constants in compound 5: (a) determination of 3J(C1′,H6R) and 3J(C1′,H6S) using the J-HMBC experiment; (b) determination of 3J(C4,H6S) using the HSQC-HECADE experiment. (c) Correlation between the values for 3J(C1′,H6R) (red), 3J(C1′,H6S) (black), and 3J(C6,H1′) in compounds 1–8 labeled according to the stereochemistry at the anomeric carbon of the terminal residue.
