title: Antitubercular sterols from Thalia multiflora Horkel ex Koernicke.
abstract: Bioassay guided isolation of an antitubercular extract of the aerial parts of Thalia multiflora led to the isolation of nine stigmast-5-ene and stigmasta-5,22-dien steroids, four isorhamnetin and quercetin flavonoid glycosides, two ceramides, an indole alkaloid and two simple phenolic compounds. Stigmast-5-en-3beta-ol-7-one (2), stigmast-4-ene-6beta-ol-3-one (3), stigmast-5,22-dien-3beta-ol-7-one (7) and stigmast-4,22-dien-6beta-ol-3-one (8) were found to be the most active compounds with MIC values of 1.98 +/- 0.02, 4.2 +/- 0.17, 1.0 +/- 0.06 and 2.2 +/- 0.3 microg/mL, respectively. Compounds 2, 3, 7 and 8 were not cytotoxic to Vero cells at 102 microg/mL. This investigation constitutes the first report of a chemical study of a species of the genus Thalia.
authors.affiliation: Department of Pharmacology and Toxicology, Division of Medicinal and Natural Products Chemistry, College of Pharmacy, University of Arizona, 1703 E. Mabel Street, Tucson, Arizona 85721-0207, USA.
authors.forename: Maria-Teresa
authors.initials: MT
authors.lastname: Gutierrez-Lugo
authors.forename: Yuehong
authors.initials: Y
authors.lastname: Wang
authors.forename: Scott G
authors.initials: SG
authors.lastname: Franzblau
authors.forename: Enrique
authors.initials: E
authors.lastname: Suarez
authors.forename: Barbara N
authors.initials: BN
authors.lastname: Timmermann
mesh_terms: D000995:Antitubercular Agents / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D005419:Flavonoids / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D006801:Humans; D032426:Marantaceae; D008826:Microbial Sensitivity Tests; D009169:Mycobacterium tuberculosis / Q000187:drug effects*; D008517:Phytotherapy; D035261:Plant Components, Aerial; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D014376:Tuberculosis / Q000188:drug therapy
chemical_list: D000995:Antitubercular Agents; D005419:Flavonoids; D010936:Plant Extracts