title: Six new triterpenoid saponins from the root and stem bark of Cephalanthus occidentalis.
abstract: From the root and stem bark of Cephalanthus occidentalis L., a common American wetland species, six new triterpenoid saponins (1 - 6), together with 29 known compounds were isolated and identified. On the basis of spectroscopic analysis and chemical degradation, the structures of new compounds were elucidated as 3-O-beta-glucopyranosylcincholic acid (1), cincholic acid 28-O-beta-glucopyranosyl ester (2), 3-O-beta-glucopyranosyl-(1-->4)-beta-fucopyranosylcincholic acid (3), 3-O-beta-glucopyranosyl-(1-->4)-beta-fucopyranosylcincholic acid 28-O-beta-glucopyranosyl ester (4), 3-O-beta-glucopyranosylcincholic acid 28-O-alpha-arabinopyranosyl-(1-->2)-beta-glucopyranosyl ester (5), and 3-O-beta-glucopyranosylquinovic acid 28-O-alpha-arabinopyranosyl-(1-->2)-beta-glucopyranosyl ester (6).
authors.affiliation: Center for Medicinal Plant Research, Arthur Temple College of Forestry, Stephen F. Austin State University, Nacogdoches, Texas 75962-6109, USA.
authors.forename: Zhizhen
authors.initials: Z
authors.lastname: Zhang
authors.forename: Shiyou
authors.initials: S
authors.lastname: Li
authors.forename: Shanmin
authors.initials: S
authors.lastname: Zhang
mesh_terms: D006801:Humans; D008517:Phytotherapy; D024301:Plant Bark; D010936:Plant Extracts / Q000737:chemistry*; D018517:Plant Roots; D019666:Rubiaceae; D012503:Saponins / Q000737:chemistry; D014315:Triterpenes / Q000737:chemistry
chemical_list: D010936:Plant Extracts; D012503:Saponins; D014315:Triterpenes