title: Chemical constituents of the aerial parts of Schnabelia tetradonta.
abstract: A phytochemical study on the ethanol extract of the aerial parts of Schnabelia tetradonta led to the isolation of five new compounds, 1-5, together with seven known compounds. The structures of the new compounds were elucidated on the basis of spectral data interpretation as 2alpha,3alpha,23,29-tetrahydroxyolean-12-en-28-oic acid (1), 3-O-beta-d-glucuronopyranosyl-2beta,3beta,16beta-trihydroxy-28-norolean-12-en-15-on-23-oic acid (2), 21-O-beta-d-glucopyranosyl-3beta,21alpha,30-trihydroxyolean-13(18)-en-24-oic acid (3), 6-C-beta-l-arabinopyranosyl-8-C-alpha-l-arabinopyranosylapigenin (4), and 4-acetylaminoethylphenyl 1-O-[6-O-(Z)-p-methoxycinnamoyl-beta-d-glucopyranosyl(1-->2)]-[beta-d-glucopyranosyl(1-->3)]-alpha-l-rhamnopyranoside (5), respectively.
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China.
authors.forename: Hui
authors.initials: H
authors.lastname: Dou
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhou
authors.forename: Changxiang
authors.initials: C
authors.lastname: Chen
authors.forename: Shulin
authors.initials: S
authors.lastname: Peng
authors.forename: Xun
authors.initials: X
authors.lastname: Liao
authors.forename: Lisheng
authors.initials: L
authors.lastname: Ding
mesh_terms: D002681:China; D004578:Electron Spin Resonance Spectroscopy; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D006868:Hydrolysis; D019686:Lamiaceae / Q000737:chemistry*; D008968:Molecular Conformation; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D009828:Oleanolic Acid / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D006027:Glycosides; D009828:Oleanolic Acid