1H, 13C, heteronuclear singular quantum correlation (HSQC) and heteronuclear multiple bond correlation (HMBC) NMR spectra were recorded at 20°C on a Bruker Avance 600 MHz spectrometer (Bruker Corporation) with a Bruker 5-mm broadband probe, operating at 600 MHz for 1H NMR and 150 MHz for 13C NMR. Polysaccharides (20.0 mg) were dissolved in D2O (0.5 ml) and centrifuged at 10,462 × g for 3 min at 25°C to remove any undissolved polysaccharide. Data were analyzed using standard Bruker software (MestReNova v10.0; Bruker Corporation).

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