title: A triterpene from Rubus pinfaensis.
abstract: A new pentacyclic triterpene, pinfaensin, was isolated from the roots of Rubus pinfaensis and the structure elucidated by 13C NMR methods. This triterpene, a glycoside of pinfaensic acid (glucosyl 23-formyl-2 alpha,3 beta,19 alpha-trihydroxyurs-12-en-28-oate), in order to achieve purification and characterization, was hydrolysed to previously unreported pinfaensic acid which on acetylation and methylation gave methyl diacetoxypinfaensate (methyl 2 alpha,3 beta-diacetoxy-23-formyl-19 alpha-hydroxyurs-12-en-28-oate).
authors.affiliation: School of Pharmacy, Robert Gordon University, Aberdeen, U.K.
authors.forename: D G
authors.initials: DG
authors.lastname: Durham
authors.forename: X
authors.initials: X
authors.lastname: Liu
authors.forename: R M
authors.initials: RM
authors.lastname: Richards
mesh_terms: D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy; D008516:Medicine, Chinese Traditional; D008969:Molecular Sequence Data; D010946:Plants, Medicinal / Q000737:chemistry*; D016339:Spectrometry, Mass, Fast Atom Bombardment; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D014315:Triterpenes; C090265:pinfaensin