New sesquiterpenoids from the root of Guatteria multivenia.
J Nat Prod
; 65(6): 856-9, 2002 Jun.
Article
en En
| MEDLINE
| ID: mdl-12088427
ABSTRACT
A phytochemical investigation of the CHCl(3) fraction of an ethanol extract of the root of Guatteria multivenia furnished nine compounds, of which four are sesquiterpenes (1-4) and five are alkaloids (5-9). Of the four sesquiterpenes, two are new (1, 3), named guatterin A (1) and dihydromadolin-K (3), and two are known (2, 4), identified as madolin-K (2) and madolin-W (4). The five known alkaloids were identified as liriodenine (5), lysicamine (6), lanuginosine (7), guadiscine (8), and O-methylpallidine (9). All the known compounds were isolated from this species for the first time. Structures of the new compounds were determined by extensive NMR studies, including DEPT, COSY, HMQC, HMBC, and NOESY. Compound 7 showed weak inhibitory effect against Candida albicans secreted aspartic proteases (SAP) with IC(50) of 45 microg/mL. Compound 5 was found to have antimicrobial activity against C. albicans, Cryptococcusneoformans, Staphylococcus aureus, and methicillin-resistant S. aureus (MRS) with IC(50)/MIC values of 3.5/6.25, 2.0/12.5, 2.0/3.13, and 2.0/3.13 microg/mL, respectively.
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Bases de datos:
MEDLINE
Métodos Terapéuticos y Terapias MTCI:
Terapias_biologicas
Asunto principal:
Plantas Medicinales
/
Inhibidores de Proteasas
/
Sesquiterpenos
/
Annonaceae
/
Alcaloides
/
Antiinfecciosos
País/Región como asunto:
America do sul
/
Peru
Idioma:
En
Revista:
J Nat Prod
Año:
2002
Tipo del documento:
Article
País de afiliación:
Estados Unidos