Constituintes químicos e atividade antioxidante de Sida galheirensiS Ulbr. (Malvaceae)
| Autor: | Davi Antas e Silva, Tânia Maria Sarmento da Silva, Antônio Cláudio da Silva Lins, Danielly Albuquerque da Costa, José Marcílio Sobral Cavalcante, Wemerson Neves Matias, Maria de Fátima Vanderlei de Souza, Raimundo Braz Filho |
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| Jazyk: | English<br />Spanish; Castilian<br />Portuguese |
| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | Química Nova, Vol 29, Iss 6, Pp 1250-1254 (2006) |
| Druh dokumentu: | article |
| ISSN: | 1678-7064 0100-4042 |
| DOI: | 10.1590/S0100-40422006000600020 |
| Popis: | The phytochemical investigation of Sida galheirensis led to the isolation of 5,4'-dihydroxy-3,7,3´-trimethoxyflavone, 17³-ethoxyphaeoforbide, a rare natural product, 6,7-dimethoxycoumarin, ortho-hydroxybenzoic acid, sitosterol-3-O-beta-D-glucopyranoside, stigmasterol-3-O-beta-D-glucopyranoside, 5,7,4'-trihydroxyflavone, 5,7,3',4'-tetrahydroxyflavone, kaempferol-3-O-beta-D-(6"-E-p-coumaroyl) glucopyranoside and luteolin 7-O-beta-D-glucopyranoside. Their structures were assigned based on spectroscopic analyses, including two-dimensional NMR techniques. Antioxidant activities of hexane, CHCl3, EtOAc, BuOH and EtOH extracts of Sida galheirensis were measured using the 1,2-diphenyl-2-picryl-hydrazyl (DPPH) free radical scavenging assay. This is also the first work reporting the chemical investigation of Sida galheirensis. |
| Databáze: | Directory of Open Access Journals |
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