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Vermixocins A and B, 3-(1'-hydroxy-3'-methylbutyl)- and 3-(1'-acetoxy-3'-methylbutyl)-11-hydroxy-4-methoxy-9-methyl-5H,7H- dibenzo[c,f][1,5]dioxocin-5-one, respectively, were isolated from the mycelium of Penicillium vermiculatum. Both metabolites showed cytotoxic effects on lympholeukemia cells P388.
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Proksa et al. (1992) studied this question.
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