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Chem. Commun., 2009, 6810 - 6812, DOI: 10.1039/b910501h

Multiple convergence in polyketide biosynthesis: a third folding mode to the anthraquinone chrysophanol

Gerhard Bringmann, Tobias A. M. Gulder, Andreas Hamm, Michael Goodfellow and Hans-Peter Fiedler

The polyketide chrysophanol is shown to be formed, in an organism-specific way, by a third folding mode, involving a remarkable cyclization of a bicyclic diketo precursor, thus establishing the first example of multiple convergence in polyketide biosynthesis.

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