Asterogynins: Secondary Metabolites from a Costa Rican Endophytic Fungus

@inproceedings{Cao2010AsterogyninsSM,
  title={Asterogynins: Secondary Metabolites from a Costa Rican Endophytic Fungus},
  author={Shugeng Cao and Leila Saxby Ross and Giselle Tamayo and Jon Clardy},
  booktitle={Organic letters},
  year={2010}
}
An endophytic fungus isolated from the small palm Asterogyne martiana produced two unusual steroid-like metabolites, asterogynin A (1) and asterogynin B (2), along with the known compounds viridiol (3) and viridin (4). Asterogynins A and B were characterized by NMR and MS spectroscopic analysis. 

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Asterogynin B (2): colorless powder

  • Asterogynin B (2): colorless powder

D +46 (c, 0.03 MeOH); UV (MeOH) λ max (log e) 235

  • D +46 (c, 0.03 MeOH); UV (MeOH) λ max (log e) 235

H-4b), 3.37 m (H 2 - 15), 3.56 s (-OMe), 6.05 s (H-1), 7.78 d, J ) 8.0 Hz (H-11), 8.01 d, J ) 8.0 Hz (H-12); 13 C NMR (150 MHz, CD 3 OD) d 25.3 (C-15), 25.8 (C-19), 37.0 (C-16)

  • 54 s (H 3 -19), 2.74 m (H 2 -16 and H-4a), 2.94…

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