Now showing items 1-6 of 6

    • Quesada, Luisa; Areche Medina, Carlos; Astudillo, Luis; Gutiérrez, Margarita; Sepúlveda, Beatriz; San Martín Barrientos, Aurelio (Natural Products, 2012)
      Four isoflavones, isolated from the whole plant of Azorella madreporica, were identified as angustone C (1), alpinumisoflavone (2), licoisoflavone A (3) and isolupalbigenin (4) by spectroscopic studies. The compounds were ...
    • Polo, Efraín; Trilleras, Jorge; Ramos, Juan; Galdámez Silva, Antonio; Quiroga, Jairo; Gutiérrez, Margarita (MDPI AG, 2016)
      A small series of tetrahydroindazoles was prepared, starting from 2-acetylcyclohexanone and different hydrazines using reflux and a focused microwave reactor. Microwave irradiation (MW) favored the formation of the desired ...
    • Astudillo, Luis; Gutiérrez, Margarita; Quesada, Luisa; San Martín Barrientos, Aurelio; Espinoza, Luis; Peñailillo, Patricio (2014)
      Two new diterpenes,2-acetoxy-13-hydroxy-mulin-11-ene and 2-acetoxy-mulin-11, 13-diene,have been isolated from the aerial parts of Azorella spinosa and their structures determined by spectroscopic and conventional chemical ...
    • Astudillo, Luis; De La Guarda, Waleska; Gutiérrez, Margarita; San Martín Barrientos, Aurelio (Verlag der Zeitschrift fur Naturforschung, 2009)
      Tetrahydroquinoline (1), prepared by a traditional synthetic method, the imino Diels-Alder reaction, was biotransformed by Mortierella isabelina to afford a new compound, 2, characterized by spectroscopic methods. © 2009 ...
    • Areche, Carlos; Cejas, Patricia; Thomas, Pablo; San Martín Barrientos, Aurelio; Astudillo, Luis; Gutiérrez, Margarita; Loyola, Luis A. (Sociedade Brasileira de Quimica, 2009)
      The inhibition of the enzyme acetylcholinesterase is considered as a strategy for the treatment of Alzheimer's disease, senile dementia, ataxia, and myasthenia gravis. Three lanostane- and two cycloartane-type triterpenes, ...
    • Polo, Efraín; Ibarra-Arellano, N.; Prent-Peñaloza, Luis; Morales-Bayuelo, Alejandro; Henao, José; Galdámez, Antonio; Gutiérrez, Margarita (Academic Press Inc., 2019)
      The chalcone and bis-chalcone derivatives have been synthesized under sonication conditions via Claisen-Schmidt condensation with KOH in ethanol at room temperature (20–89%). The structures were established on the basis ...