Browsing by Author "Garbarino, Juan"
Now showing 1 - 4 of 4
Results Per Page
Sort Options
Item Estudio de líquenes chilenos. XIX. Investigaciones de metabolitos secundarios en líquenes antárticos(1993) Garbarino, JuanSe presentan los resultados de las macro extracciones de los metabolitos secundarios de 28 especies liquénicas recolectadas en las islas Shetland del Sur. Se analiza la heterogeneidad estructural y los rendimientos de los 33 compuestos aisladas entre ellos 2 nuevos dépsidos y tridépsidas, y sus relaciones fotoquímicas. Se confirma el carácter de producto natural del peroxiergosterol mediante análisis in situ de 29 especies y su alta frecuencia podría ser consecuencia de la radiación ultravioleta.Item Studies on Chilean lichens. XI Secondary metabolites from Antarctic lichens(1989) Quilhot, Wanda; Garbarino, Juan; Piovano, Marisa; Chamy, María Cristina; Gambaro, Vicente; Oyarzún, María Luisa; Vinet, Cindy; Hormaechea, Valeria; Fiedler, PeterThe major secondary metabolites of 17 Antarctic lichen species were studied via macroextraction. The most frequently found compounds were usnic acid and atranorin. Two polysubstituted depsides were isolated from Lecania brialmontii, brialmontins 1 and 2; from Catillaria corymbosa a derivative of hiascic acid was isolated, 2' -0-methylhiascic acid. Peroxyergosterol, a sterol infrequent in lichens, was found in four species.Item Studies on Chilean Lichens. XVI. Advances in the Chemistry of Secondary Metabolites from Antarctic Lichens(1991) Piovano, Marisa; Garbarino, Juan; Chamy, María Cristina; Zúñiga, Viviana; Miranda, Cecilia; Céspedes, Elsa; Fiedler, Peter; Quilhot, Wanda; Araya, GriseldaThe secondary metabolites of 12 species of Antarctic lichens belonging to various systematical groups hace been analyzed by macroextraction. The compounds were characterized by their physical and spectroscopic properties. Cladonia cornuta, C. lepidophora and Ochrolechia deceptionis were analyzed for the first time. Atranorin and usnic acid were the most frecuent lichen substances. The sterol ergosterol peroxide was isolated from all the species analyzedItem Studies on Chilean Lichens. XXI. Secondary metabolites from the Antarctic species Hypogymnia lugubris(1993) Piovano, Marisa; Quilhot, Wanda; Chamy, María; Fiedler, Peter; Garbarino, JuanFrom Hypogymnia lugubris (Pers.) Krog, a lichen collected in Antarctica, atranorin, ergosterol peroxide, and physodic, physodalic, protocetraric and usnic acids were isolated.