Title: Studies on fungal polysaccharides. XXVV. An alkalisoluble glucan of Omphalia lepidescence.
Abstract: A water-insoluble β-D-glucan designated as OL-2, [α]20D : -0.1° (0.5N NaOH), was isolated from a fungal crude drug, "Raigan" (dried fruiting body of Omphalia lepidescence). The results of periodate oxidation and methylation studies indicated that OL-2 possessed a highly branched structure consisting of 1, 3- and 1, 6-linked β-D-glucopyranosyl residues.