Structural Features of Fructans from the Root of Cyathula officinalis Kuan†
Dedicated to Professor ZHOU Wei-Shan on the occasion of his 80th birthday.
Abstract
Three fructans (CoPS1, CoPS2 and CoPS3) were isolated from the root of Cyathula officinalis Kuan, a traditional Chinese medicine. The structures of the fructans were determined by methylation, reductive-cleavage method combined with GC-MS analysis, and 13C NMR spectroscopy. These results show that the fructans (CoPS1, CoPS2 and CoPS3) are graminan type fructans, and comprised of (2→1)-and (2→6)-linked β-D-fructofuranosyl backbone residues containing high branches.