27 ^<13>C-^<13>Cカップリングを利用した構造及び生合成研究

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  • 27 Utilization of ^<13>C-^<13>C coupling in structural and biosynthetic studies

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An alternative double labeling method which utilizes ^<13>C-^<13>C coupling in structural and biosynthetic studies was applied to the structural elucidation of dihydrolatumcidin. The cmr spectrum of the double labeled and mixed labeled metabolites showing strong ^<13>C-^<13>C coupling gave enough information on carbon sequences and made it possible to determine the total structure of the metabolite. Direct evidence was obtained that acetic acid was incorporated into dihydrolatumcidin without cleavage of the C-C bond of the acetic acid molecule. The detail mechanism of biosynthesis of polyketides, terpenes and steroid can be studied by utilizing ^<13>C-^<13>C coupling.

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