title: New virescenosides from the marine-derived fungus Acremonium striatisporum.
abstract: Five new diterpene glycosides, virescenosides Z4-Z8 (1-5) have been isolated from a marine strain of Acremonium striatisporum KMM 4401 associated with the holothurian Eupentacta fraudatrix. Their structures were determined by HRESI-MS and 1D and 2D NMR. Virescenosides Z4-Z8 contain rare altruronic acid 4C1 and 1C4 conformations as their carbohydrate components. Virescenosides Z5 and Z7 exhibit an unusual 16-chloro, 15-hydroxyethylgroup as their side chains.
authors.affiliation: Pacific Institute of Bioorganic Chemistry, Far East Branch of the Russian Academy of Sciences, Prospect 100 let Vladivostoku, 159, Vladivostok 690022, Russian Federation. afiyat@piboc.dvo.ru
authors.forename: Shamil S
authors.initials: SS
authors.lastname: Afiyatullov
authors.forename: Anatoly I
authors.initials: AI
authors.lastname: Kalinovsky
authors.forename: Alexandr S
authors.initials: AS
authors.lastname: Antonov
mesh_terms: D000164:Acremonium / Q000737:chemistry*; D000818:Animals; D004224:Diterpenes / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry*; D047332:Holothuria / Q000382:microbiology; D015394:Molecular Structure
chemical_list: D004224:Diterpenes; D006027:Glycosides