title: Phytogrowth-inhibitory and antifungal constituents of Helianthella quinquenervis.
abstract: Investigation on the roots of Helianthella quinquenervis (Hook.) A. Gray (Asteraceae), led to the isolation of one new benzofuran (6-methoxy-tremetone (1)) and a new prenylacetophenone (4-beta-D-(glucopyranosyloxy)-3-[3-methoxy-trans-isopenten-1 -yl] acetophenone (3)). In addition, 6-hydroxy-3-methoxytremetone (2), encecalin (6), euparin (5), demethylencecalin (4), and angelic acid were obtained. Structural assignments of the isolated compounds were based on spectroscopic and spectrometric analysis. Natural products 1-4 showed marginal cytotoxicity against three human tumor cell lines [MCF-7, A-549, and HT-29]. Compounds 4 and 6 inhibited the radicle growth of Amaranthus hypochondriacus and Echinochloa crusgalli. Furthermore, substances 4-6 exhibited antifungal activity against Trichophyton mentagrophytes.
authors.affiliation: Departamento de Farmacia, Instituto de Química, Mexico.
authors.forename: P
authors.initials: P
authors.lastname: Castañeda
authors.forename: L
authors.initials: L
authors.lastname: Gómez
authors.forename: R
authors.initials: R
authors.lastname: Mata
authors.forename: B
authors.initials: B
authors.lastname: Lotina-Hennsen
authors.forename: A L
authors.initials: AL
authors.lastname: Anaya
authors.forename: R
authors.initials: R
authors.lastname: Bye
mesh_terms: D000818:Animals; D000935:Antifungal Agents / Q000302:isolation & purification* / Q000494:pharmacology; D000972:Antineoplastic Agents, Phytogenic / Q000302:isolation & purification* / Q000494:pharmacology; D001156:Artemia; D004354:Drug Screening Assays, Antitumor; D005658:Fungi / Q000187:drug effects / Q000254:growth & development; D006131:Growth Inhibitors / Q000302:isolation & purification* / Q000494:pharmacology; D019073:HT29 Cells; D006801:Humans; D008826:Microbial Sensitivity Tests; D063245:Plant Development; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology; D018517:Plant Roots / Q000737:chemistry; D010944:Plants / Q000187:drug effects; D010946:Plants, Medicinal / Q000737:chemistry*; D014407:Tumor Cells, Cultured; D014481:United States
chemical_list: D000935:Antifungal Agents; D000972:Antineoplastic Agents, Phytogenic; D006131:Growth Inhibitors; D010936:Plant Extracts