title: Ergosteroid derivatives from an algicolous strain of Aspergillus ustus.
abstract: One new ergosteroid derivative, isocyathisterol (1), and eight known compounds (2-9) were isolated from the culture of an algicolous strain (cf-42) of Aspergillus ustus obtained from the fresh tissue of marine green alga Codium fragile. The structure and absolute configuration of 1 were unequivocally identified by using NMR and mass spectroscopic methods as well as quantum chemical calculations. Compound 1 exhibited weak antibacterial activity.
authors.affiliation: a Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences , Yantai 264003 , P.R. China.
authors.forename: Xiang-Hong
authors.initials: XH
authors.lastname: Liu
authors.forename: Feng-Ping
authors.initials: FP
authors.lastname: Miao
authors.forename: Xiao-Rui
authors.initials: XR
authors.lastname: Liang
authors.forename: Nai-Yun
authors.initials: NY
authors.lastname: Ji
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D001230:Aspergillus / Q000737:chemistry*; D000460:Chlorophyta / Q000382:microbiology*; D004875:Ergosterol / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D008386:Marine Biology; D013058:Mass Spectrometry; D015394:Molecular Structure
chemical_list: D000900:Anti-Bacterial Agents; C000593027:isocyathisterol; D004875:Ergosterol
keywords: algicolous fungus; Aspergillus ustus; ergosteroid; isocyathisterol