Five pentacyclic triterpenoid glycosyl esters have been isolated from the aerial parts of Rubus pileatus and three of them are new compounds. Their structures were elucidated on the basis of spectral data and chemical transformations as 3β,19α-dihydroxyurs-12-en-24,28-dioic acid-28-O-(6'-O-methyl-β-D-glucopyranosyl) ester, 2α,3β,19α-trihydroxyurs-12-en-24,28-dioic acid-28-O-(6'-O-methyl-β-D-glucopyranosyl) ester and 2α,3β,19α-trihydroxyurs-12-en-24,28-dioic acid-28-O-(3'-O-methyl-β-D-glucopyranosyl) ester.
rosaceae, pentacyclic triterpene, Rubus pileatus, ursane glycosyl esters, methylglucoside
Publication DOI: 10.1016/S0031-9422(97)00314-2Journal NLM ID: 0151434Publisher: Elsevier
Institutions: Department of Chemistry, Institute of Organic Chemistry, National Laboratory of Applied Organic Chemistry
Methods: 13C NMR, 1H NMR, NMR-2D, IR, FAB-MS, ESI-MS
Found