Abstract
AbstractThree new indole‐containing diketopiperazine alkaloids, named variecolorins M–O (1–3), together with the eight known analogues 4–11, were isolated from a deep‐ocean sediment‐derived fungus, Penicillium griseofulvum. Their structures were determined by analysis of the spectroscopic data. The 2,2‐diphenyl‐1‐picrylhydrazinyl (DPPH) radical‐scavenging activities and the cell‐proliferation inhibitory activities of the three new compounds 1–3 were investigated.
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