Journal
MAGNETIC RESONANCE IN CHEMISTRY
Volume 47, Issue 1, Pages 92-95Publisher
WILEY
DOI: 10.1002/mrc.2346
Keywords
NMR; H-1 NMR; C-13 NMR; 2D NMR; amide alkaloid; natural products; structure elucidation
Funding
- National Natural Science Foundation of China [20772162, 20572136]
- 863 Foundation of China [2007AA09Z431, 2007AA09Z414]
- Natural Science Foundation of Guangdong province, China [021732, 2007A032600001]
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The structure elucidations and complete H-1 and C-13 NMIR assignments are reported for two new natural products: 3-benzylidene-8,8a-dihydroxy-2-methyl-hexahydro-pyrrolo[1,2-a]pyrazine-1,4-dione(1) and 4-hydroxy-6-(hydroxy-phenyl-methyl)-N-(3-methyl-butyryl)-nicotinamide (2). Both of these secondary metabolites were isolated from the fermentation medium of a Mangrove endophytic fungus. High resolution electron impact mass spectrometry (HREIMS), FT-IR Spectroscopy and NMR experiments including gCOSY,gHMQC, gHMBC and NOE were used for determination of the structures and assignments of the amide alkaloids. Copyright (C) 2008 John Wiley & Sons, Ltd.
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