Chemical constituents and antioxidant activity of leaves and branches of Eugenia copacabanensis Kiaersk (Myrtaceae)

Química Nova

Carvalho Junior, Almir Ribeiro de¹  Gomes, Geovany Amorim¹  Universidade Federal Rural do Rio de Janeiro, Seropédica, Brasil¹  Ferreira, Rafaela Oliveira¹  Carvalho, Mário Geraldo de¹ 

关键词: Eugenia copacabanensis;    chemical constituents;    antioxidant activity.;   

DOI  :  10.5935/0100-4042.20140079

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Phytochemical investigation of Eugenia copacabanensis allowed for the isolation and identification of following compounds: β-sitosterol, β-sitosterol-glucoside, eight triterpenes, (mixture of α- and β-amyrins, ursolic acid, 30-hydroxy-ursolic acid, betulin, friedelin, friedelan-3,4-lactone, and taraxerol), a mixture of three sesquiterpenes, (clovandiol, globulol, and viridiflorol), three flavonoids (kaempferol-3-O-β-D-rhamnoside, quercetin-3-O-α-L-arabinoside, and quercetin), and a mixture of four coumaroyl esters (octacosanyl, heptacosanyl, hexacosanyl, and tetracosanyl coumarates). The structures of these compounds were assigned based on comparison with literature data and spectroscopic analysis, including analysis by two-dimensional NMR techniques. Total phenolic content and total flavonoids were evaluated. Antioxidant activities of methanol extracts and fractions were measured by the 1,2-diphenyl-2-picryl-hidrazyl free radical scavenging assay.

【 授权许可】

Unknown