The 13C n.m.r. spectra and incorporations of 13C-labelled precursors into pyrone and dihydroisocoumarin pentaketide metabolites from the culture liquors of Aspergillus melleus are reported. Detection of a two-bond 13C–13C coupling in a metabolite enriched from [1,2-13C2]acetate provides proof for an intramolecular rearrangement occurring during biosynthesis.
的13个的C NMR谱和掺入13 C标记的前体引入
吡喃酮和二氢异
香豆素pentaketide代谢物从培养液蜂蜜曲霉报告。在富含[1,2- 13 C 2 ]
乙酸的代谢物中检测到双键13 C – 13 C偶联为
生物合成过程中发生分子内重排提供了证据。