title: Chemical constituents and allelopathic and antioxidant activities of Alchorneopsis floribunda Müll. Arg. (Euphorbiaceae).
abstract: Chemical investigation of extracts from the stems and leaves of Alchorneopsis floribunda Müll. Arg., collected in the Amazon region, was performed. The main isolated compounds were triterpenes (α-amyrin, β-amyrin, lupeol, betulin, betulinic acid, uvaol, erythrodiol and oleanolic acid) and phenolic acid derivatives from 4-hydroxybenzoic acid (gallic and protocatechuic acids and isocorilagin). In the germination assays, high inhibitory allelopathic effects of the extracts and isocorilagin were observed and 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity of isocorilagin was higher than those of the standards used (Trolox and butylated hydroxyanisole). This is the first chemical study of the genus Alchorneopsis (Euphorbiaceae).
authors.affiliation: Faculdade de Química - ICEN, Universidade Federal do Para , Av. Augusto Correa n. 1, Belem 66075-110, Brazil.
authors.forename: Elenilze Figueiredo
authors.initials: EF
authors.lastname: Batista
authors.forename: Danielle Monteiro
authors.initials: DM
authors.lastname: Costa
authors.forename: Giselle M S P
authors.initials: GM
authors.lastname: Guilhon
authors.forename: Adolfo Henrique
authors.initials: AH
authors.lastname: Muller
authors.forename: Lourivaldo Silva
authors.initials: LS
authors.lastname: Santos
authors.forename: Mara Silvia Pinheiro
authors.initials: MS
authors.lastname: Arruda
authors.forename: Alberto Cardoso
authors.initials: AC
authors.lastname: Arruda
authors.forename: Milton Nascimento
authors.initials: MN
authors.lastname: Silva
authors.forename: Joyce Kelly
authors.initials: JK
authors.lastname: Silva
authors.forename: Ricardo Souza
authors.initials: RS
authors.lastname: Secco
authors.forename: Antonio Pedro Silva
authors.initials: AP
authors.lastname: Souza Filho
authors.forename: Bruno Apolo
authors.initials: BA
authors.lastname: Figueira
mesh_terms: D000975:Antioxidants / Q000737:chemistry*; D001713:Biphenyl Compounds / Q000737:chemistry; D019665:Euphorbiaceae / Q000737:chemistry*; D009828:Oleanolic Acid / Q000031:analogs & derivatives / Q000737:chemistry; D010636:Phenols / Q000737:chemistry; D010851:Picrates / Q000737:chemistry; D013729:Terpenes / Q000737:chemistry; D014315:Triterpenes / Q000737:chemistry; D000094062:Betulinic Acid
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D009828:Oleanolic Acid; D010636:Phenols; D010851:Picrates; D013729:Terpenes; D014315:Triterpenes; C077953:erythrodiol; C002503:betulin; D000094062:Betulinic Acid; C004931:1,1-diphenyl-2-picrylhydrazyl; C036380:beta-amyrin; C013330:uvaol