Collect. Czech. Chem. Commun. 1994, 59, 2714-2720

Chemical and 13C NMR Studies of a Rhamnoarabinogalactan from the Leaves of Plantago lanceolata L. var. libor

Alžbeta Kardošová and Peter Capek

Institute of Chemistry, Slovak Academy of Sciences, 842 38 Bratislava, Slovak Republic


A rhamnoarabinogalactan isolated from the leaves of Plantago lanceolata L. var. libor has been investigated by methylation analysis, partial hydrolysis, and 13C NMR spectroscopy. The structural conclusions obtained by 13C NMR measurements were consistent with the data from methylation analysis. The polysaccharide has a β-(1→6)-D-galactan core branched on O-3 by side chains of (1→5)-linked α-L-arabinofuranosyl units, some of which bear in position O-5 terminal β-D-galactopyranosyl residues. L-Rhamnose occurs as nonreducing ends.