title: A new coumarin from the fruits of Coutarea hexandra.
abstract: A new 5-O-beta-D-glucopyranosyl-4-(4-hydroxyphenyl)-7-methoxy-2H-chromen-2-one (1), together with four known compounds, one coumarin, 5-O-beta-D-galactopyranosyl-4-(4-hydroxyphenyl)-7-methoxy-2H-chromen-2-one (2) and three cucurbitacins, 23,24-dihydrocucurbitacin F (3), 23,24-dihydro-25-acetylcucurbitacin F (4) and 2-O-beta-D-glucopyranosyl-23,24-dihydrocucurbitacin F (5) have been isolated and characterised from the ethanol extract of Coutarea hexandra fruits. Their structures have been established by spectroscopic analysis (NMR and MS). Interpretation of the HMQC, HMBC, COSY-45 and NOESY experiments permitted us to establish stereochemistry of the natural products. All compounds were tested in cytotoxicity assays against the breast (MCF-7), lung (H-460), and central nervous system (SF-268) human cancer cell lines.
authors.affiliation: Centro de Investigaciones Farmacognósticas de la Flora Panameña (CIFLORPAN), Facultad de Farmacia, Universidad de Panamá, Panamá 0824-00172, República de Panamá.
authors.forename: D
authors.initials: D
authors.lastname: Olmedo
authors.forename: N
authors.initials: N
authors.lastname: Rodríguez
authors.forename: Y
authors.initials: Y
authors.lastname: Vásquez
authors.forename: P N
authors.initials: PN
authors.lastname: Solís
authors.forename: J L
authors.initials: JL
authors.lastname: López-Pérez
authors.forename: A San
authors.initials: AS
authors.lastname: Feliciano
authors.forename: M P
authors.initials: MP
authors.lastname: Gupta
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D003374:Coumarins / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D004354:Drug Screening Assays, Antitumor; D005638:Fruit / Q000737:chemistry; D006801:Humans; D019906:Nuclear Magnetic Resonance, Biomolecular; D010946:Plants, Medicinal / Q000737:chemistry; D012235:Rhodamines / Q000737:chemistry; D019666:Rubiaceae / Q000737:chemistry*
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D003374:Coumarins; D012235:Rhodamines; C022027:lissamine rhodamine B