Oxepinamides L and M, two new oxepine-pyrimidinone-ketopiperazine type nonribosomal peptides from Aspergillus californicus.
2020
A chemical investigation of Aspergillus californicus IBT 16748 led to the isolation of two new oxepine-pyrimidinone-ketopiperazine type nonribosomal peptides oxepinamides L (1) and M (2). Their structures were characterised by spectroscopic analysis including HRESIMS, 1D and 2D NMR. The absolute structure of 1 was assigned by ECD calculation. The antibacterial and cytotoxic properties of 1 were evaluated.
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