Studies on Saponin Accumulative in Regularities Panax notoginseng (Burk) F. H.Chen HPLC Fingerprints Identification of Panax ginseng C. A. Mey., P. quinquefolin L. and P. notoginseng (Burk. F. H. Chen) Research progress in hypoglycemic effect of natural dammarane saponins Cloning and bioinformatic analysis of 3-hydroxy-3-methylglutaryl coenzyme-A reductase gene from Panax notoginseng