Chemical constituents from medical and edible plants of Rosa roxburghii

Rosa roxburghii, a kind of the medical and edible plants belonging to the Rosaceae family, is widely distributed in the southwest districts of China, especially Guizhou province. Now, by reason of the extensive bioactivities, the plant is widely used in the field of food, health product, drug, and so on. In the course of our continuing search for the bioactive constituents, thirteen compounds were isolated from R. roxburghii, and their structures were determined on the basis of physicochemical property, spectroscopic data and comparison with the literatures, as 2-oxo pomolic acid(1), 1β-hydroxyeuscaphic acid(2), euscaphic acid(3), arjunic acid(4), tormentic acid(5), kaiiichigeside F1(6), rosamultin(7), arjunetin(8), 2ɑ, 3ɑ, 19ɑ-trihydroxy-olean-12-en-28-oic acid 28-O-β-D-glucopyranoside(9), 2α, 3α, 19α, 24-tetrahydroxyolean-12-en-28-oic-acid 28-O-β-D-glucopyranosyl ester(10), pyrogallic acid (11), daucosterol(12), and 1, 2-decanediol(13). Compounds 9 and 10 were firstly obtained from Rosaceae family, and compounds 1,4,5,9-11,13 were isolated from this plant for the first time.