Abstract: Twelve compounds were isolated and purified from petroleum ether fraction of the pericarps of Rosa davurica Pall.by silica gel and Sephadex LH-20 column chromatography. Their structures were elucidated on the basis of physicochemical properties and spectroscopic data as nonacosane (1),α-tocopherol (2),diethyl phthalate (3),dibutyl phthalate (4), β-sitosterol (5), α-amyrin(6),uvaol (7),botulin (8),betulic acid (9),19-α-hydroxyursolic acid (10),daucosterol (11) and maltose (12).Compounds 1-3, 6-7 and 12 were isolated from R.davurica for the first time.Petroleum ether fraction showed some inhibitory activity on the pancreatic lipase by fluorescent method and on α-glucosidase from the yeast by 96-microplate based method.

Key words: Rosa davurica Pall., pericarps, chemical constituents, pancreatic lipase, &alpha, -glucosidase