NOVOS FLAVONOIDES DE Margaritopsis carrascoana COM ATIVIDADE ANTIOXIDANTE
oleh: Raimundo Regivaldo G. Nascimento, Jackelyne A. Monteiro, Antônia Torres A. Pimenta, Maria Teresa S. Trevisan, Raimundo Braz-Filho, Elnatan Bezerra de Souza, Edilberto R. Silveira, Mary Anne S. Lima
| Format: | Article |
|---|---|
| Diterbitkan: | Sociedade Brasileira de Química 2015-01-01 |
Deskripsi
EtOH extracts of the stems and leaves of Margaritopsis carrascoana were found to contain new flavonoids luteolin 7-O-{β-D-apiofuranosil-(1→6)-[β-Lrhamnopyranosyl-( 1→2)]-β-D-glucopyranosyl} (5) and luteolin 7-O-{α-L-rhamnopyranosyl-(1→6)-[β-L-rhamnopyranosyl- (1→2)]-β-D-glucopyranosyl} (6), in addition to the known dihydrodehydrodiconiferyl alcohol 4-O-b-D-glucopyranoside (1), luteolin 7-O-b-L-rhamnopyranosyl-(1→2)-β-D-glucopyranosyl (2), luteolin 7-O-[b-D-apiofuranosyl-(1→6)]-β-D-glucopyranoside (3), and chrysoeriol 7-O-[b-D-apiofuranosyl-(1→6)]-β-D-glucopyranoside (4). All isolated compounds presented higher antioxidant activities than the controls, BHT and quercetin, while the extract of the stems showed strong AChE inhibition.