title: Triterpenoid saponins from Campsiandra guayanensis.
abstract: Thirteen new triterpenoid saponins (1-13) were isolated from the aerial parts of Campsiandra guayanensis. Their structures were elucidated by 1D and 2D NMR experiments including 1D-TOCSY, DQF-COSY, ROESY, HSQC, and HMBC spectroscopy, as well as ESIMS analysis. The aglycon moieties of 1-10 were assigned as oleanane derivatives and those of 11-13 as lupane derivatives.
authors.affiliation: Dipartimento di Chimica Bioorganica e Biofarmacia, Università di Pisa, Via Bonanno 33, 56126 Pisa, Italy. braca@farm.unipi.it
authors.forename: Alessandra
authors.initials: A
authors.lastname: Braca
authors.forename: Ayman F
authors.initials: AF
authors.lastname: Abdel-Razik
authors.forename: Jeannette
authors.initials: J
authors.lastname: Mendez
authors.forename: Nunziatina
authors.initials: N
authors.lastname: De Tommasi
mesh_terms: D029911:Caesalpinia / Q000737:chemistry*; D002240:Carbohydrate Sequence; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010946:Plants, Medicinal / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D021241:Spectrometry, Mass, Electrospray Ionization; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*; D014687:Venezuela
chemical_list: D012503:Saponins; D014315:Triterpenes