title: Anthraquinone-steroids, evanthrasterol A and B, and a meroterpenoid, emericellic acid, from endophytic fungus, Emericella variecolor.
abstract: Two new anthraquinone-steroids, evanthrasterol A and B (1 and 2), and a new meroterpenoid, emericellic acid (3), together with six known compounds (4-9) were isolated from an endophytic fungus, Emericella variecolor. Their structures were determined by spectroscopic analysis (1D and 2D NMR, HRESIMS and FTIR). Herein emericellic acid (3) is a new skeleton of meroterpenoid with carboxylic functional group at C-9' and this is the first report on isolation of anthraquinone-steroids from E. variecolor.
authors.affiliation: Research Centre for Bioorganic Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Bangkok 10330, Thailand.
authors.forename: Jatupol
authors.initials: J
authors.lastname: Liangsakul
authors.affiliation: Research Centre for Bioorganic Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Bangkok 10330, Thailand.
authors.forename: Suphongphan
authors.initials: S
authors.lastname: Srisurichan
authors.affiliation: Research Centre for Bioorganic Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Bangkok 10330, Thailand. Electronic address: psuracha@chula.ac.th.
authors.forename: Surachai
authors.initials: S
authors.lastname: Pornpakakul
mesh_terms: D000880:Anthraquinones / Q000737:chemistry* / Q000302:isolation & purification; D032842:Emericella / Q000737:chemistry* / Q000378:metabolism; D004875:Ergosterol / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D008958:Models, Molecular; D008968:Molecular Conformation; D054830:Sesterterpenes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D000880:Anthraquinones; D054830:Sesterterpenes; D004875:Ergosterol
keywords: Anthraquinone–steroid; Emericella variecolor; Meroterpenoid