Chromone derivatives from a sponge-derived strain of the fungus Corynespora cassiicola.
J Nat Prod
; 78(2): 286-93, 2015 Feb 27.
Article
en En
| MEDLINE
| ID: mdl-25594263
ABSTRACT
Twelve new chromone derivatives, corynechromones A-L (1-12), were isolated from the sponge-derived fungus Corynespora cassiicola XS-200900I7. Among them, 1/2, 3/4, 5/6, and 7/8 were pairs of epimers. The planar structures were determined by extensive NMR spectroscopic data. The absolute configurations of 1-10 were assigned by the modified Mosher's method and TDDFT ECD calculations together with comparison of their CD spectra. These are the first chromone derivatives reported from the genus Corynespora. A possible rule to determine the absolute configurations at C-2 in chromone derivatives by CD was proposed.
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1
Banco de datos:
MEDLINE
Asunto principal:
Poríferos
/
Ascomicetos
/
Cromonas
Límite:
Animals
Idioma:
En
Año:
2015
Tipo del documento:
Article