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A bioassay-guided fractionation of the phytotoxic crude extract of Alternaria solani resulted in the isolation of two phytotoxic metabolites identified as zinniol ( 1 ) and a new polyketide: homozinniol ( 2 ). A third metabolite, 6-[(3‘,3‘-dimethylallyl)oxy]-4-methoxy-5-methylphthalide ( 3 ) was also isolated and identified. Structural assignment of the metabolites was based primarily on the analysis of their mass spectrometry and 1 H NMR spectroscopy data.
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Gamboa‐Angulo et al. (1997) studied this question.
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