Corymbulosins D-H, 2-Hydroxy- and 2-Oxo-clerodane Diterpenes from the Bark of Laetia corymbulosa.
J Nat Prod
; 80(4): 1065-1072, 2017 04 28.
Article
em En
| MEDLINE
| ID: mdl-28290698
ABSTRACT
A bioactive CH3OH-CH2Cl2 (11) extract of the bark of Laetia corymbulosa provided five new clerodane diterpenes with an isozuelanin skeleton, designated as corymbulosins D-H (1-5), as well as the known corymbulosins B (6) and C (7), for which the relative configurations were not previously determined. The structures of 1-5 were characterized on the basis of 1D and 2D NMR spectroscopic and HRMS analysis. The absolute configurations of all isolated compounds 1-7 were verified through chemical methods, including modified Mosher esterifications or oxidation of the hydroxy group at C-2, ECD experiments, and spectroscopic data comparison. The isolated compounds were evaluated for antiproliferative activity against a small panel of human cancer cell lines.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Salicaceae
/
Casca de Planta
/
Diterpenos Clerodânicos
/
Antineoplásicos Fitogênicos
Limite:
Humans
País/Região como assunto:
America do sul
/
Peru
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article