title: Altenuene derivatives from an unidentified freshwater fungus in the family Tubeufiaceae.
abstract: Four new altenuene derivatives called dihydroaltenuenes A (1) and B (2) and dehydroaltenuenes A (3) and B (4), along with five known compounds, including isoaltenuene (5), altenuene (6), and 5'-epialtenuene (7), were isolated from cultures of an unidentified freshwater aquatic fungal species in the family Tubeufiaceae. The structures of 1-4 were determined by analysis of NMR and MS data. The relative stereochemistry was determined on the basis of (1)H NMR J-values and NOE data, while the absolute configuration of a representative member of the group (5) was assigned by CD spectral analysis of its bis-N,N-dimethylaminobenzoate derivative. Compounds 1, 3, 4, 5, and 6 showed antibiotic activity against Gram-positive bacteria.
authors.affiliation: Department of Chemistry, University of Iowa, Iowa City, IA 52242, USA.
authors.forename: Ping
authors.initials: P
authors.lastname: Jiao
authors.forename: James B
authors.initials: JB
authors.lastname: Gloer
authors.forename: Jinx
authors.initials: J
authors.lastname: Campbell
authors.forename: Carol A
authors.initials: CA
authors.lastname: Shearer
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D001203:Ascomycota / Q000737:chemistry*; D001231:Aspergillus flavus / Q000187:drug effects; D001412:Bacillus subtilis / Q000187:drug effects; D002176:Candida albicans / Q000187:drug effects; D005618:Fresh Water; D005670:Fusarium / Q000187:drug effects; D006094:Gram-Positive Bacteria / Q000187:drug effects; D007783:Lactones / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D015394:Molecular Structure; D009657:North Carolina; D019906:Nuclear Magnetic Resonance, Biomolecular; D013211:Staphylococcus aureus / Q000187:drug effects
chemical_list: D000900:Anti-Bacterial Agents; D007783:Lactones; C040005:altenuene