Abstract

The complete 13C–13C coupling pattern in sterigmatocystin enriched from [13C2]acetate has been determined and confirms that no fandomisation of labelling in ring-A occurs; 2H-labelling studies indicate that 2H from [2H3]acetate is retained at C-6 of sterigmatocystin to rule out mechanisms for xanthone ring formation requiring introduction of the phenolic hydroxy-group on this carbon.

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