title: A-type proanthocyanidin antioxidant from Dioclea lasiophylla.
abstract: The A-type proanthocyanidin, epigallocatechin-(2beta-->7,4beta-->8)-epicatechin, together with the known epicatechin, luteolin 3'beta-D-glucopyranoside, chrysoeriol 7beta-D-glucopyranoside and 2-methylpentan-2,4-diol, were isolated from leaves of Dioclea lasiophilla. The structures were established on the basis of their spectral data. Antioxidant activities of isolates were measured using the autooxidation of beta-carotene in a linolenic acid suspension method.
authors.affiliation: Instituto de Química, Universidade Federal da Bahia, Salvador, Brazil.
authors.forename: A L
authors.initials: AL
authors.lastname: Barreiros
authors.forename: J P
authors.initials: JP
authors.lastname: David
authors.forename: L P
authors.initials: LP
authors.lastname: de Queiroz
authors.forename: J M
authors.initials: JM
authors.lastname: David
mesh_terms: D000872:Anthocyanins / Q000737:chemistry / Q000302:isolation & purification*; D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification*; D007887:Fabaceae / Q000737:chemistry*; D015394:Molecular Structure; D010946:Plants, Medicinal; D044945:Proanthocyanidins; D013057:Spectrum Analysis
chemical_list: D000872:Anthocyanins; D000975:Antioxidants; D044945:Proanthocyanidins; C013221:proanthocyanidin