Antioxidant phenylpropanoid-substituted epicatechins from Trichilia catigua.
J Nat Prod
; 70(12): 2010-3, 2007 Dec.
Article
em En
| MEDLINE
| ID: mdl-18020420
Two new phenylpropanoid-substituted epicatechins, namely, catiguanin A ( 1) and catiguanin B ( 2), were isolated from the bark of Trichilia catigua along with four known compounds, cinchonain Ia ( 3), cinchonain Ib ( 4), cinchonain Ic ( 5), and cinchonain Id ( 6). The structures of 1 and 2 were elucidated by analysis of spectroscopic data and by comparison of their NMR data with those of previously reported cinchonains. The isolated compounds exhibited potent antioxidant activity in the alpha,alpha-diphenyl-beta-picrylhydrazyl (DPPH) radical scavenging test, with IC 50 values in the 2.3-9.4 microM range.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fenilpropionatos
/
Catequina
/
Sequestradores de Radicais Livres
/
Meliaceae
/
Antioxidantes
País/Região como assunto:
America do sul
/
Brasil
Idioma:
En
Revista:
J Nat Prod
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Japão
País de publicação:
Estados Unidos