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Lowdenic acid (1), a new antifungal metabolite with an unusual structure and a mixed biogenetic origin, has been obtained from nonsporulating cultures of a previously undescribed Verticillium sp. (MYC-406 = NRRL 29280) that was isolated as a colonist of polypore basidiomata. The gross structure of 1 was proposed by analysis of NMR data and confirmed by X-ray diffraction analysis, which enabled assignment of relative stereochemistry. Compound 1 occurs as an equilibrium E/Z mixture. The known antifungal metabolite canescin A (2) was also isolated.
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Angawi et al. (2003) studied this question.
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