Chondrosterins A-E, triquinane-type sesquiterpenoids from soft coral-associated fungus Chondrostereum sp.

ABSTRACT: The marine fungus Chondrostereum sp. was collected from a soft coral Sarcophyton tortuosum from the South China Sea. This fungus was cultured in potato dextrose broth medium and the culture broth was extracted with EtOAc. Five new triquinane-type sesquiterpenoids, chondrosterins A-E (1-5), and the known sesquiterpenoid hirsutanol C (6), were isolated. The structures were elucidated mainly on the basis of NMR, MS, and X-ray single-crystal diffraction data. Chondrosterin A (1) showed significant cytotoxic activities against cancer lines A549, CNE2, and LoVo with IC(50) values of 2.45, 4.95, and 5.47 μM, respectively.

SUBMITTER: Li HJ 

PROVIDER: S-EPMC3347020 | biostudies-literature | 2012 Mar

REPOSITORIES: biostudies-literature