F390C A member of the class xanthones which consists of a dihydroxanthone skeleton substituted by hydroxy groups at positions 4 and 8, a hydroxymethyl group at position 6 and a methoxycarbonyl group at position 4a (the 4R,4aS stereoisomer). It is isolated from Penicillium and exhibits potent antitumour activity against both human and murine tumour cell lines. |
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