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Two New Spiro-Heterocyclic γ-Lactams from A Marine-Derived Aspergillus fumigatus Strain CUGBMF170049.

Xiuli XuJiahui HanYanan WangRui LinHaijin YangJiangpeng LiShangzhu WeiSteven W PolyakFu-Hang Song
Published in: Marine drugs (2019)
Two new spiro-heterocyclic γ-lactam derivatives, cephalimysins M (1) and N (2), were isolated from the fermentation cultures of the marine-derived fungus Aspergillus fumigatus CUGBMF17018. Two known analogues, pseurotin A (3) and FD-838 (4), as well as four previously reported helvolic acid derivatives, 16-O-propionyl-16-O-deacetylhelvolic acid (5), 6-O-propionyl-6-O-deacetylhelvolic acid (6), helvolic acid (7), and 1,2-dihydrohelvolic acid (8) were also identified. One-dimensional (1D), two-dimensional (2D) NMR, HRMS, and circular dichroism spectral analysis characterized the structures of the isolated compounds.
Keyphrases
  • high resolution
  • magnetic resonance imaging
  • computed tomography
  • molecular docking
  • structure activity relationship
  • multidrug resistant
  • gram negative
  • data analysis
  • simultaneous determination