title: Configurational analysis of cubebins and bicubebin from Aristolochia lagesiana and Aristolochia pubescens.
abstract: (8S,8'R,9S)-, (8R,8'R,9R)-, and (8R,8'R,9S)-cubebins, together with (8R,8'R,8''R,8'''R,9R,9''S)-bicubebin, were isolated from Aristolochia lagesiana and Aristolochia pubescens. Their structures were determined by spectroscopic methods, including 1H and 13C NMR spectroscopy at low temperatures, and by chemical transformations.
authors.affiliation: Instituto de Química, Universidade Estadual Paulista, UNESP, C.P. 355, 14801-970, Araraquara, São Paulo, Brazil.
authors.forename: Inara C
authors.initials: IC
authors.lastname: de Pascoli
authors.forename: Isabele R
authors.initials: IR
authors.lastname: Nascimento
authors.forename: Lucia M X
authors.initials: LM
authors.lastname: Lopes
mesh_terms: D015107:4-Butyrolactone / Q000737:chemistry / Q000494:pharmacology; D030022:Aristolochia / Q000737:chemistry*; D002942:Circular Dichroism; D017705:Lignans / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D010936:Plant Extracts / Q000737:chemistry*; D010946:Plants, Medicinal
chemical_list: D017705:Lignans; D010936:Plant Extracts; C433065:cubebin; D015107:4-Butyrolactone