Dichotocejpins A–C: New Diketopiperazines from a Deep-Sea-Derived Fungus Dichotomomyces cejpii FS110     

Zhen Fan  Zhang-Hua Sun  Zhong Liu  Yu-Chan Chen  Hong-Xin Liu  Hao-Hua Li  Wei-Min Zhang 《Marine drugs》2016,14(9)

Three new diketopiperazines, dichotocejpins A–C (1–3), together with eight known analogues (4–11), were isolated from the culture of the deep-sea sediment derived fungus Dichotomomyces cejpii FS110. Their structures, including absolute configurations, were elucidated by a combination of HRESIMS, NMR, X-ray crystallography, and ECD calculations. Compounds 4–6, 10–11 showed significant cytotoxic activities against MCF-7, NCI-H460, HepG-2, and SF-268 tumor cell lines. Compound 1 exhibited excellent inhibitory activity against α-glucosidase with an IC₅₀ of 138 μM.  相似文献