The 13C n.m.r. spectra of phomazarin methyl ester and seven further derivatives of phomazarin have been assigned. Incorporations of [13C]acetates and [13C]- and [14C]-malonates by cultures of Pyrenochaeta terrestris indicate that phomazarin is biosynthesised by condensation, followed by oxidative ring-fission, of a single nonaketide precursor chain.
A. J. Birch and T. J. Simpson, J. Chem. Soc., Perkin Trans. 1, 1979, 816 DOI: 10.1039/P19790000816
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