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Chemical structures and reactions discussed in the text. (a) Cleavage of lignin structure A via fungal SET oxidation, followed by autooxidation of the resulting lignin benzaldehydes. Stereochemistry is not shown for structure A. (b) Formation of structure A in the lignifying plant cell wall via free radical coupling and nucleophilic addition of water, showing routes for production of the erythro- and threo-diastereomers. OMe and MeO, methoxyl.
