title: An unusual caffeic acid derived bicyclic [2.2.2] octane lignan and other constituents from Cordia rufescens.
abstract: This work reports isolation of an unusual lignan with a bicyclic [2.2.2] octene skeleton, named rufescenolide (1), from stems of Cordia rufescens, along with β-sitosterol, stigmasterol, syringaldehyde, 3-β-O-D-glucopyranosyl-sitosterol, methyl caffeate, 4-methoxy-protocatechuic acid and methyl rosmarinate. Structural characterizations employed IR spectroscopic, ESIHRMS and mono and dimensional NMR spectroscopy.
authors.affiliation: Instituto de Química, Universidade Federal da Bahia, Salvador, BA, Brazil.
authors.forename: Ademir E
authors.initials: AE
authors.lastname: do Vale
authors.forename: Jorge M
authors.initials: JM
authors.lastname: David
authors.forename: Edlene O
authors.initials: EO
authors.lastname: dos Santos
authors.forename: Juceni P
authors.initials: JP
authors.lastname: David
authors.forename: Lidercia C R C
authors.initials: LC
authors.lastname: e Silva
authors.forename: Marcus V
authors.initials: MV
authors.lastname: Bahia
authors.forename: Hugo N
authors.initials: HN
authors.lastname: Brandão
mesh_terms: D001643:Bridged Bicyclo Compounds / Q000737:chemistry / Q000302:isolation & purification*; D002109:Caffeic Acids / Q000737:chemistry*; D031213:Cordia / Q000737:chemistry*; D062385:Hydroxybenzoates / Q000737:chemistry; D017705:Lignans / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009795:Octanes / Q000737:chemistry* / Q000302:isolation & purification; D018547:Plant Stems / Q000737:chemistry; D012855:Sitosterols / Q000737:chemistry / Q000302:isolation & purification; D013265:Stigmasterol / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D001643:Bridged Bicyclo Compounds; D002109:Caffeic Acids; D062385:Hydroxybenzoates; D017705:Lignans; D009795:Octanes; D012855:Sitosterols; C572817:rufescenolide; C009091:protocatechuic acid; C025473:gamma-sitosterol; D013265:Stigmasterol