Abstract
Four new metabolites have been isolated from Aspergillus sydowi and named sydowic acid, sydowinin A, sydowinin B, and sydowinol, respectively. Sydowic acid, C15H20O4, forms colorless needles, mp 151°C, [α]d–6.4°. Sydowinin A, C16H12O6, forms pale yellow needles, mp 218~220°C. Sydowinin B, C16H12O7, forms yellow needles, mp 220°C. Sydowinol C16H14O7, forms yellow needles, mp 157~159°C, [α]d–51° The structure of sydowic acid was shown to be represented by formula I on the basis of spectroscopic data.
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