1. New Furan and Cyclopentenone Derivatives from the Sponge-Associated Fungus Hypocrea Koningii PF04.
- Author
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Li-Jian Ding, Bin-Bin Gu, Wei-Hua Jiao, Wei Yuan, Ying-Xin Li, Wei-Zhuo Tang, Hao-Bing Yu, Xiao-Jian Liao, Bing-Nan Han, Zhi-Yong Li, Shi-Hai Xu, and Hou-Wen Lin
- Abstract
Two new furan derivatives, hypofurans A and B (1 and 2), and three new cyclopentenone derivatives, hypocrenones A-C (3-5), along with seven known compounds (6-12), were isolated from a marine fungus Hypocrea koningii PF04 associated with the sponge Phakellia fusca. Among them, compounds 10 and 11 were obtained for the first time as natural products. The planar structures of compounds 1-5 were elucidated by analysis of their spectroscopic data. Meanwhile, the absolute configuration of 1 was determined as 2R, 3R by the comparison of the experimental and calculated electronic circular dichroism (ECD) spectra. All the isolates were evaluated for their antibacterial and antioxidant activity. Compounds 1, 10, and 12 all showed modest antibacterial activ against Staphylococcus aureus ATCC25923 (MIC, 32 μg/mL). In addition, compounds 1, 10 and 11 exhibited moderate DPPH radical scavenging capacity with IC
50 values of 27.4, 16.8, and 61.7 μg/mL, respectively. [ABSTRACT FROM AUTHOR]- Published
- 2015
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