Structurally Diverse Polycyclic Salicylaldehyde Derivative Enantiomers from a Marine-Derived Fungus Eurotium sp. SCSIO F452.

Zhong, Wei-Mao; Wei, Xiao-Yi; Chen, Yu-Chan; Zeng, Qi; Wang, Jun-Feng; Shi, Xue-Feng; Tian, Xin-Peng; Zhang, Wei-Min; Wang, Fa-Zuo; Zhang, Si

To enlarge the chemical diversity of Eurotium sp. SCSIO F452, a talented marine-derived fungus, we further investigated its chemical constituents from a large-scale fermentation with modified culture. Four pairs of new salicylaldehyde derivative enantiomers, euroticins F-I (1–4), as well as a known one eurotirumin (5) were isolated and characterized. Compound 1 features an unprecedented constructed 6/6/6/5 tetracyclic structures, while 2 and 3 represent two new types of 6/6/5 scaffolds. Their structures were established by comprehensive spectroscopic analyses, X-ray diffraction, 13C NMR, and electronic circular dichroism calculations. Selected compounds showed significant inhibitory activity against α-glucosidase and moderate cytotoxic activities against SF-268, MCF-7, HepG2, and A549 cell lines.

CIRCULAR dichroism; ENANTIOMERS; FUNGI; CELL lines; X-ray diffraction

Marine Drugs, 2021, Vol 19, Issue 10, p543

1660-3397

Academic Journal

10.3390/md19100543