title: Pentacyclic triterpene 5-phenylpenta-2,4-dienoyl esters from Peltastes peltatus (Vell.) Woodson.
abstract: Two new pentacyclic triterpene esters, peltastine A [3beta-[5-phenyl-(2E,4E)-penta-2,4-dienoyloxy]-urs-12-ene] and peltastine B [3beta-[5-phenyl-(2E,4E)-penta-2,4-dienoyloxy]-lup-20(29)-ene], have been isolated from the stem of Peltastes peltatus (Vell.) Woodson along with the previously reported beta-amyrin juarezate [3-[5-phenyl-(2E,4E)-penta-2,4-dienoyloxy]-olean-12-ene]. The structures of these compounds were established by MS, 1D- and 2D-NMR experiments as well as by chemical degradation.
authors.affiliation: Departamento de Química, Universidade Federal de Alagoas, 57072-970 Maceió-AL, Brazil.
authors.forename: Margarida M S
authors.initials: MM
authors.lastname: Humberto
authors.forename: Maria Cleonice B S
authors.initials: MC
authors.lastname: Nascimento
authors.forename: Antônio E G
authors.initials: AE
authors.lastname: Sant'Ana
mesh_terms: D029062:Apocynaceae / Q000737:chemistry*; D004952:Esters / Q000737:chemistry*; D006576:Heterocyclic Compounds, 4 or More Rings / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009828:Oleanolic Acid / Q000031:analogs & derivatives* / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry*
chemical_list: C495623:3beta-(5-phenyl-(2E,4E)-penta-2,4-dienoyloxy)-lup-20(29)-ene; C495624:3beta-(5-phenyl-(2E,4E)-penta-2,4-dienoyloxy)-urs-12-ene; C495625:5-phenyl-(2E,4E)-penta-2,4-dienoic acid; D004952:Esters; D006576:Heterocyclic Compounds, 4 or More Rings; D014315:Triterpenes; D009828:Oleanolic Acid