title: Quinoline alkaloids, coumarins and volatile constituents of Helietta longifoliata.
abstract: A new quinoline alkaloid named helietidine ( 1), and seven known compounds ( 2 - 8) have been isolated from the stem barks of Helietta longifoliata. The structures of the new and the known compounds were established on the basis of spectral evidence, especially by 2D NMR ( 1H- 1H COSY, NOESY, HMQC, HMBC). In addition, the volatile constituents of H. longifoliata leaves were analysed by gas chromatography-mass spectrometry (GC-MS). Twenty-five constituents were identified representing ca. of 96 % of the oil, and limonene (17.50 %), germacrene D (16.60 %), elemol (11.81 %), bicyclogermacrene (11.67 %), guaiol (11.53), and epi-alpha-bisabolol (7.24 %) were the most abundant components. The oil was bioactive against some Gram-positive and Gram-negative bacteria, as revealed by bioautography.
authors.affiliation: Departamento de Química, Universidade Federal de Santa Maria, RS, Brazil.
authors.forename: Neusa F
authors.initials: NF
authors.lastname: de Moura
authors.forename: Euclésio
authors.initials: E
authors.lastname: Simionatto
authors.forename: Carla
authors.initials: C
authors.lastname: Porto
authors.forename: Solange C
authors.initials: SC
authors.lastname: Hoelzel
authors.forename: Emilia C
authors.initials: EC
authors.lastname: Dessoy
authors.forename: Nilo
authors.initials: N
authors.lastname: Zanatta
authors.forename: Ademir F
authors.initials: AF
authors.lastname: Morel
mesh_terms: D000470:Alkaloids / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D003374:Coumarins / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D008826:Microbial Sensitivity Tests; D011804:Quinolines / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D027821:Rutaceae / Q000737:chemistry*; D013210:Staphylococcus / Q000187:drug effects
chemical_list: D000470:Alkaloids; D000900:Anti-Bacterial Agents; D003374:Coumarins; D011804:Quinolines; C464950:helietidine