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Dithiodiketopiperazine derivatives from endophytic fungi and . | LitMetric
A new epidithiodiketopiperazine (ETP), pretrichodermamide G (), along with three known (epi)dithiodiketopiparazines () were isolated from cultures of and , endophytic fungi associated with medicinal plants and sp., respectively. The structure of the new compound () was established on the basis of spectroscopic data, including 1D/2D NMR and HRESIMS. The isolated compounds were investigated for their antifungal, antibacterial and cytotoxic potential against a panel of microorganisms and cell lines. Pretrichodermamide A () displayed antimicrobial activity towards the plant pathogenic fungus and the human pathogenic bacterium with MIC values of 1 mg/mL (2 mM) and 25 µg/mL (50 µM), respectively. Meanwhile, epicorazine A () exhibited strong to moderate cytotoxicity against L5178Y, Ramos, and Jurkat J16 cell lines with IC values ranging from 1.3 to 28 µM. Further mechanistic studies indicated that induces apoptotic cell death.
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