Journal
ORGANIC LETTERS
Volume 17, Issue 3, Pages 656-659Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol503646c
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Funding
- National Key Basic Research Program of China (973)'s Project [2010CB833800, 2011CB915503]
- Open Foundation of the Laboratory for Polar Science, Polar Research Institute of China [KP201305]
- National High Technology Research and Development Program (863 Program) [2012AA092104]
- National Natural Science Foundation of China [31270402, 21172230, 20902094, 41176148, 21002110]
- Guangdong Province-CAS Joint Research Program [2011B090300023, 2012B091100264]
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Three new 4-hydroxy-2-pyridone alkaloids, arthpyrones A-C (1-3), were isolated from the sponge-derived fungus Arthrinium arundinis ZSDS1-F3. Their structures were elucidated on the basis of spectroscopic analysis, CD spectra, quantum chemical calculation, and X-ray single-crystal diffraction analysis. Compounds 1 and 2 possessed a 2-pyridone core featured with a decalin moiety linked via a carboxide bridge bearing a novel oxabicyclo[3.3.1]nonane ring system rarely discovered in nature. A possible biosynthetic pathway for them was proposed.
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