title: A new compound from Gentianopsis paludosa.
abstract: A new compound, named gentianopfluorenone (1), along with three known compounds,1-O-beta-d-glucopyranosyl-5-hydroxy-3-methoxyxanthone (2), 1-O-[beta-d-xylopyranosyl-(1 --> 6)-beta-d-glucopyranosyl]-7,8-dihydroxy-3-methoxyxanthone (3), and apigenin (4), were isolated from the whole herb of Gentianopsis paludosa. On the basis of spectral and chemical evidence, the structure of 1 was elucidated as 4,4a,6-trihydroxy-5-methoxy-fluoren-2,9-dione. Compounds 2-4 were isolated from the plant for the first time.
authors.affiliation: Natural Products and Glycoconjugate Research Group, Dalian Institute of Chemical Physics, Graduate School of the Chinese Academy of Sciences, Dalian 116023, China. whd77@163.com
authors.forename: H-D
authors.initials: HD
authors.lastname: Wang
authors.forename: C-Y
authors.initials: CY
authors.lastname: Tan
authors.forename: X-F
authors.initials: XF
authors.lastname: Bai
authors.forename: Y-G
authors.initials: YG
authors.lastname: Du
authors.forename: B-C
authors.initials: BC
authors.lastname: Lin
mesh_terms: D047310:Apigenin / Q000737:chemistry / Q000302:isolation & purification*; D029965:Gentianaceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D011083:Polycyclic Compounds / Q000737:chemistry / Q000302:isolation & purification*; D044004:Xanthones / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C525299:4,4a,6-trihydroxy-5-methoxyfluoren-2,9-dione; D011083:Polycyclic Compounds; D044004:Xanthones; D047310:Apigenin