The 13C-n.m.r. spectra of methyl 2-allyl-3,5-dichloro-1,4-dihydroxycyclopent-2-enoate (II), enriched with [1-13C]-, [2-13C]-, and [1,2-13C]-acetate respectively by the fungus Periconia macrospinosa suggest that it is biosynthesised from an aromatic precursor, structurally related to the β-ketide derived co-metabolite, 5-chloro-8-hydroxy-6-methoxy-3-methyl-3,4-dihydroisocoumarin (I).
J. S. E. Holker and K. Young, J. Chem. Soc., Chem. Commun., 1975, 525 DOI: 10.1039/C39750000525
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