Isolation and characterization of α-(1→6)-glucans from Cistanche deserticola

Abstract

Three unique polysaccharides (1–3) have been obtained from the 0.5 M NaOH extract of the stem of Cistanche deserticola Y. C. Ma. The results of methylation analysis, partial acid hydrolysis, ¹³C, ¹H NMR, ¹H–¹H COSY, HMQC and HMBC spectroscopic analyses indicate that they are all composed of glucose, having a backbone of α-(1 → 6)-glucan, and have different molecular weights. Their structures differ from that of linear starch.

Keywords:

• Cistanche deserticola
• Polysaccharide
• α-(1 → 6)-Glucan