title: Bi- and tetraflavonoids from Aristolochia ridicula.
abstract: From stems of Aristolochia ridicula, two biflavones, four unusual chalcone-flavone dimers and one tetraflavonoid were isolated. The structures of the seven compounds were elucidated by spectroscopic methods.
authors.affiliation: Instituto de Química, Universidade Estadual Paulista, Araraquara, São Paulo, Brazil.
authors.forename: F J
authors.initials: FJ
authors.lastname: Carneiro
authors.forename: N
authors.initials: N
authors.lastname: Boralle
authors.forename: D H
authors.initials: DH
authors.lastname: Silva
authors.forename: L M
authors.initials: LM
authors.lastname: Lopes
mesh_terms: D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D019684:Magnoliopsida / Q000737:chemistry*; D015394:Molecular Structure; D013057:Spectrum Analysis
chemical_list: D005419:Flavonoids