title: Antiplasmodial metabolites isolated from the marine octocoral Muricea austera.
abstract: Bioassay-guided fractionation of the MeOH extract from the octocoral Muricea austera collected in the Pacific coast of Panama led to the isolation of eight compounds, including three tyramine derivatives (1-3), two steroidal pregnane glycosides (4, 5), and three sesquiterpenoids (6-8). Compounds 2-5 are new natural products, and their structures were determined on the basis of their spectroscopic data (HRMS, 1D and 2D NMR, and CD studies). The antiprotozoal activities of the natural compounds 1-8 as well as those of a series of synthetic glycosides (11-22) and tyramine derivatives (23-35) were evaluated in vitro against a drug-resistant Plasmodium falciparum and intracellular form of Trypanosoma cruzi.
authors.affiliation: Departamento de Química Organica, Instituto de Acuicultura y Unidad de RMN de Biomoléculas Asociada al CSIC, Universidad de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
authors.forename: Marcelino
authors.initials: M
authors.lastname: Gutiérrez
authors.forename: Todd L
authors.initials: TL
authors.lastname: Capson
authors.forename: Héctor M
authors.initials: HM
authors.lastname: Guzman
authors.forename: José
authors.initials: J
authors.lastname: Gonzalez
authors.forename: Eduardo
authors.initials: E
authors.lastname: Ortega-Barría
authors.forename: Emilio
authors.initials: E
authors.lastname: Quiñoa
authors.forename: Ricardo
authors.initials: R
authors.lastname: Riguera
mesh_terms: D000818:Animals; D037421:Anthozoa / Q000737:chemistry*; D000962:Antimalarials / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D000981:Antiprotozoal Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D004352:Drug Resistance, Microbial; D008386:Marine Biology; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D010963:Plasmodium falciparum / Q000187:drug effects*; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D014349:Trypanosoma cruzi / Q000187:drug effects; D014439:Tyramine / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology
chemical_list: D000962:Antimalarials; D000981:Antiprotozoal Agents; D012717:Sesquiterpenes; D013256:Steroids; D014439:Tyramine