Indole Diketopiperazine Alkaloids Isolated From the Marine-Derived Fungus Aspergillus chevalieri MCCC M23426
Dongli Lv, Jin‐Mei Xia, Xiaoqing Guan, Qiliang Lai, Beibei Zhang, Jianhui Lin, Zongze Shao, Sulan Luo, Dongting Zhangsun, Jiang‐Jiang Qin, Weiyi Wang
Abstract
Two new indole diketopiperazines ( 1–2 ) obtained from the fermentation culture of a deep-sea-derived fungus Aspergillus chevalieri MCCC M23426, were characterized, together with nine biogenetic related compounds ( 3–11 ). The structures of 1–2 were assigned based on NMR, MS, NMR calculation, DP4+ analysis, and ECD calculation. The bioactive assay showed that compounds 1 , 5 – 7 significantly inhibited the growth of Staphylococcus aureus . Meanwhile, compound 8 potently reduced the cell viability of gastric cancer cell MKN1 with an IC 50 value of 4.6 μM.
Topics & Concepts
MicrobiologyBiologyFungusIndole testAspergillusBotanyBiochemistryMicrobial Natural Products and BiosynthesisMarine Sponges and Natural ProductsAlkaloids: synthesis and pharmacology