The stereochemistry of sugars was determined to be L-rhamnose, D-glucuronic acid and
D-glucose by acid hydrolysis and further by GC analysis of the trimethylsilyl ethers derivatives(the monosaccharides of the acid hydrolysate tR min: 9.56,
10.81 and 22.79, and the standard monosaccharides were subjected to the same reaction and GC analysis under the same condition).