Constituintes químicos e atividade antioxidante de folhas e galhos de Eugenia copacabanensis Kiaersk (Myrtaceae)

Química Nova

Almir Ribeiro De Carvalho Junior¹  Geovany Amorim Gomes¹  Rafaela Oliveira Ferreira¹  Mário Geraldo De Carvalho¹ 

[1] ,Universidade Federal Rural do Rio de Janeiro Instituto de Ciências Exatas Departamento de QuímicaSeropédica RJ ,Brasil

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

DOI  :  10.5935/0100-4042.20140079

来源: SciELO

【 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】

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