The lacquer polysaccharide (LPS)was isolation from Sap of lacquer tree (Rhus Vernicifera)

and purified by 732 cation -exchange resin and Sephadex G-100 column Chromatography. Its monosaccharide components were identified by paper and gas chromatography as following: D-galactose

D-glucuronic acid

L-Aiabinose and L- Rhamnose (7.7:1.8: 0.4:0. 1 by mol). The molecular wieght (Mw) was obtained to be 1.25 × 105 by HPGPC. The LPS was subjected to reduction of carboxyl groups

mathylation

periodate okidation and Smith degradation

and then was analyzed by GC-MS

IR

1H-NMR

13C-NMR. The results showed that LPS consists of a β(1→3) D-galactose main chain with a number of side chains

which consist of glucuronic acid Arabinose and Rhamnose. The side chains place on some of the galactose residues at C6 position with content ratio of β(1→3) to β(1→6) (1.83:1).