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Prenylated products formed from 2-methoxy-3-methylflaviolin by the Fur7 prenyltransferase. A, HPLC analysis of the two prenylated products, Fur-P1 and Fur-P2, from the Fur7 reaction with 4 (1 mm) and GPP (5 mm). B, structures of the two products, Fur-P1 and Fur-P2, elucidated from NMR data. Carbon atoms are numbered. HMBC correlations are indicated. AU, absorbance units.
