ECB-ART-47613
J Nat Prod
2002 Feb 01;652:153-7. doi: 10.1021/np010332x.
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Antifungal steroidal glycosides from the patagonian starfish anasteriasminuta: structure-activity correlations.
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Two new sulfated steroidal hexaglycosides, anasterosides A (2) and B (3), along with the known versicoside A (1) have been isolated from the Patagonian starfish Anasterias minuta. Their structures have been elucidated by spectroscopic analysis (NMR and FABMS) and chemical transformations. Compounds 1 and 2 and the synthetic pentaglycoside 1b derived from versicoside A showed antifungal activity against the plant pathogenic fungus Cladosporium cucumerinum. Desulfation of hexaglycoside 1 rendered a totally inactive saponin.
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