Premalbrancheamide: Synthesis, Isotopic Labeling, Biosynthetic Incorporation, and Detection in Cultures of Malbranchea aurantiaca.

[摘要]：An advanced metabolite, named premalbrancheamide, involved in the biosynthesis of malbrancheamide (1) and malbrancheamide B (2) has been synthesized in double 13C-labeled form and was incorporated into the indole alkaloid 2 by Malbranchea aurantiaca. In addn., premalbrancheamide has been detected as a natural metabolite in cultures of M. aurantiaca. The biosynthetic implications of these expts. are discussed.

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