Total NMR assignments of new [C7-O-C7'']-biflavones from leaves of the limonene-carvone chemotype of Lippia alba (Mill) N. E. Brown.
Magn Reson Chem
; 43(4): 334-8, 2005 Apr.
Article
em En
| MEDLINE
| ID: mdl-15674815
ABSTRACT
Phytochemical analysis of leaves of the limonene-carvone chemotype of Lippia alba led to the isolation of two biflavonoids with a new structural pattern with an ether linkage 5,5''-dihydroxy-6,4',6'',3''',4'''-pentamethoxy-[C(7)--O--C(7'')]-biflavone (1) and 4',4,5,5''-tetrahydroxy-6,6'',3'''-trimethoxy-[C(7)--O--C(7'')]-biflavone (2). Structural elucidation of the new compounds was established on the basis of spectral data, through the use of 1D NMR and several 2D shift correlated NMR pulse sequences (COSY, HMQC, HMBC and NOESY).
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Terpenos
/
Espectroscopia de Ressonância Magnética
/
Folhas de Planta
/
Lippia
/
Monoterpenos
/
Biflavonoides
Idioma:
En
Revista:
Magn Reson Chem
Assunto da revista:
QUIMICA
Ano de publicação:
2005
Tipo de documento:
Article
País de afiliação:
Brasil