title: Hongoquercins A and B, new sesquiterpenoid antibiotics: isolation, structure elucidation, and antibacterial activity.
abstract: Two new sesquiterpenoid antibiotics, hongoquercins A and B, were isolated from the extracts of an unidentified fungus. The structures of both metabolites were determined by spectroscopic analysis. They are related to a class of compounds commonly found in brown algae and dictyoceratid sponges. Hongoquercin A exhibited moderate activity against gram-positive bacteria.
authors.affiliation: Natural Products Chemistry, Wyeth-Ayerst Research, Pearl River, New York 10965, USA.
authors.forename: D M
authors.initials: DM
authors.lastname: Roll
authors.forename: J K
authors.initials: JK
authors.lastname: Manning
authors.forename: G T
authors.initials: GT
authors.lastname: Carter
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D002176:Candida albicans / Q000187:drug effects; D015169:Colony Count, Microbial; D006090:Gram-Negative Bacteria / Q000187:drug effects; D006094:Gram-Positive Bacteria / Q000187:drug effects; D006375:Helminthosporium / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D015394:Molecular Structure; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology
chemical_list: D000900:Anti-Bacterial Agents; D012717:Sesquiterpenes; C114155:hongoquercin A; C114156:hongoquercin B