title: The chemical constituents of the fungus Stereum sp.
abstract: Four new compounds, including a sesquiterpene and three aromatic compounds, and a known compound were isolated from a culture broth of the fungus Stereum sp. The novel sesquiterpene was determined to be stereumone A ((+)-2,3,4a,5,6,7,8a,9-octahydro-5-hydroxy-6,6,9-trimethyl-4,8a-epoxynaphtho[2,3-b]furan-8(8H)-one; 1), and the three new aromatic compounds were elucidated as 3,5-dihydroxy-4-(3-methylbut-2-enyl)benzene-1,2-dicarbaldehyde (2), 5,7-dihydroxy-6-(3-methylbut-2-enyl)isobenzofuran-1(3H)-one (3), butyl 2,4-dihydroxy-6-methylbenzoate (4), together with the known compound methyl 2,4-dihydroxy-6-methylbenzoate (5). The structures were established by spectroscopic methods including 2D-NMR techniques. Compounds 2 and 4 showed evident nematicidal activity against nematode Panagrellus redivivus.
authors.affiliation: Laboratory for Conservation and Utilization of Bio-resource, Yunnan University, Kunming 650091, PR China.
authors.forename: Guo-Hong
authors.initials: GH
authors.lastname: Li
authors.forename: Lei
authors.initials: L
authors.lastname: Li
authors.forename: Meng
authors.initials: M
authors.lastname: Duan
authors.forename: Ke-Qin
authors.initials: KQ
authors.lastname: Zhang
mesh_terms: D000818:Animals; D000969:Antinematodal Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D001487:Basidiomycota / Q000737:chemistry*; D048690:Fruiting Bodies, Fungal / Q000737:chemistry* / Q000302:isolation & purification*; D009348:Nematoda / Q000187:drug effects / Q000502:physiology; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology
chemical_list: D000969:Antinematodal Agents; D012717:Sesquiterpenes