Structure of a polysaccharide from Urtica fissa determined by NMR spectra

Abstract

A polysaccharide, isolated and purified from the aqueous extract of nettle plant Urtica fissa, was found to consist of d-glucose and d-arabinose. Molecular weight was determined to be Mn 4140. The NMR experiments (¹H, ¹³C, ¹H–¹H COSY, TOCSY, HSQC, NOESY, and HMBC) revealed the structure as the following repeating unit:

Keywords:

• Urtica fissa
• polysaccharide
• NMR experiment
• structure

Acknowledgments

The authors are thankful to NMR Laboratory, National Center of Biomedical Analysis, for suggestions and NMR spectral data preparation. This work was financially supported by the grant of National Natural Science Foundation of China (30870546).