Incorporation studies have been carried out with [Me-13C]methionine and aromatic compounds labelled with 14C or 2H. Evidence is presented that 4,6-dihydroxy-3,5-dimethyl-2-(1-methyl-2-oxopropyl)benzaldehyde (13) is the first enzyme-free aromatic intermediate in the biosynthesis of citrinin in P. citrinum, and that all three methylations take place on the polyketide synthetase complex.
J. Barber, R. H. Carter, M. J. Garson and J. Staunton, J. Chem. Soc., Perkin Trans. 1, 1981, 2577 DOI: 10.1039/P19810002577
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