摘要
A new polysaccharide,GBW was obtained homogeneous as determined by HPLC from the roots of Glycyrrhizia uralensis Fisch. The molecular weight was estimated to be 4000. The component sugar was identified as glucose only. The specific rotation [α]^(28)_D (C=0.1,H_2O) was +1200. The α-configuration was established by IR and ^(13)C NMR. Methylation analysis, periodate oxidation, Smith degradation, partial hydrolysis, KI-I_2 reaction and ^(13)C NMR showed that GBW is a new (1→4)linked linear α-D-glucan. The structure is shown as 1.
A new polysaccharide,GBW was obtained homogeneous as determined by HPLC from the roots of Glycyrrhizia uralensis Fisch. The molecular weight was estimated to be 4000. The component sugar was identified as glucose only. The specific rotation [α]^(28)_D (C=0.1,H_2O) was +1200. The α-configuration was established by IR and ^(13)C NMR. Methylation analysis, periodate oxidation, Smith degradation, partial hydrolysis, KI-I_2 reaction and ^(13)C NMR showed that GBW is a new (1→4)linked linear α-D-glucan. The structure is shown as 1.
