title: Chemical studies on mexican plants used in traditional medicine, VI. Additional new 4-phenylcoumarins from Exostema caribaeum.
abstract: Six additional 4-phenylcoumarins have been isolated from the MeOH extract of the bark of Exostema caribaeum. Their structures were determined by physical and chemical methods as 4'-5'-dihydroxy-7-methoxy-4-phenyl-5,2'-oxidocoumarin [1], 5,7,4'-trimethoxy-4-phenylcoumarin [2], 5,3'-dihydroxy-7,4'-dimethoxy-4-phenylcoumarin [3], 5-O-beta-D-galactopyranosyl-7,4'-dimethoxy-4-phenylcoumarin [6], 5-O-beta-D-glucopyranosyl-3',4'-dihydroxy-7-methoxy-4-phenylcoumarin+ ++ [7], and 5-O-(6"-acetyl)-beta-D-galactopyranosyl-3', 4'-dihydroxy-7-methoxy-4-phenylcoumarin [9]. The last four compounds are new natural products.
authors.affiliation: Departamento de Farmacia, Facultad de Química de la Universidad Nacional Autónoma de México, DF.
authors.forename: R
authors.initials: R
authors.lastname: Mata
authors.forename: F
authors.initials: F
authors.lastname: Calzada
authors.forename: M R
authors.initials: MR
authors.lastname: Garcia
mesh_terms: D000890:Anti-Infective Agents / Q000302:isolation & purification; D003374:Coumarins / Q000302:isolation & purification* / Q000494:pharmacology; D009682:Magnetic Resonance Spectroscopy; D008519:Medicine, Traditional; D008800:Mexico; D010946:Plants, Medicinal / Q000032:analysis*
chemical_list: D000890:Anti-Infective Agents; D003374:Coumarins