Constituintes químicos e atividade antioxidante de Byrsonima gardneriana (Malpighiaceae) Chemical constituents and antioxidant activity of Byrsonima gardneriana (Malpighiaceae)

• Main Authors: Thaísa Leite Rolim, Flávia Talita de Sousa Wanderley, Emídio Vasconcelos Leitão da Cunha, Josean Fechine Tavares, Adriana Maria Fernandes de Oliveira, Temilce Simões de Assis
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2013-01-01
• Series: Química Nova
• Subjects: Byrsonima gardneriana; triterpenes; antioxidant activity
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422013000400007

<abstract language="eng">The phytochemical investigation of Byrsonima gardneriana led to the isolation of five triterpenes and one flavonoid: D:B-Friedoolean-5-en-3-one (1), friedoolean-14-en-3-one (2), friedelan-3-one (3), lup-20(29)-en-3-ol (4), 3&#946;-hydroxiolean-12-ene (5) and 3,3',4',5,7-pentahydroxyflavan (6). Their structures were assigned based on spectroscopic analyses, including two-dimensional NMR techniques and comparison with published spectral data. Antioxidant activities of ethanol extract and phases were measured using the 1,2-diphenyl- 2-picryl-hydrazyl (DPPH) free radical scavenging assay, evaluation of total phenolic content and trolox equivalent antioxidant capacity (TEAC).