title: Structure elucidation and NMR assignments of two unusual xanthones from Lomatogonium carinthiacum (Wulf) Reichb.
abstract: Two new unusual xanthones, 5-O-β-d-glucopyranosyl-1,3,8-trihydroxy-5,6,7,8-tetrahydroxanthone (1) and 1,3,5,8-tetrahydroxy-5,6,7,8-tetrahydroxanthone (2), were isolated from Lomatogonium carinthiacum (Wulf) Reichb. Their structures were elucidated on the basis of spectroscopic methods including UV, IR, ESI-MS, 1D NMR, and 2D NMR.
authors.affiliation: College of Traditional Mongolian Medicine, Inner Mongolia University for Nationalities, Tongliao, 028000, China.
authors.forename: Qinghu
authors.initials: Q
authors.lastname: Wang
authors.forename: Bagenna
authors.initials: B
authors.lastname: Bao
authors.forename: Yulan
authors.initials: Y
authors.lastname: Chen
mesh_terms: D029965:Gentianaceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008956:Models, Chemical; D008958:Models, Molecular; D008968:Molecular Conformation; D010936:Plant Extracts / Q000737:chemistry*; D044004:Xanthones / Q000737:chemistry*
chemical_list: D010936:Plant Extracts; D044004:Xanthones
keywords: 13C; 1H; 2D NMR; HRESIMS; Lomatogonium carinthiacum; NMR; unusual xanthone