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Mostrando ítems 1121-1130 de 1908
Determinación de los metabolitos secundarios de cnidoscous basiacanthus y jatropha macrantha para su validación y uso en el Perú
(Universidad Nacional de Trujillo, 2016)
A glycosidic eudesmanolide from Hyaloseris salicifolia
(Pergamon-Elsevier Science Ltd, 2000-04)
The flowers of Hyaloseris salicifolia afforded known ivasperin, while the leaves afforded ivasperin and 2-O-(6'-O-acetyl-β-d-glucopyranosyl)- ivasperin, those structure was determined by spectroscopic methods.
Constituents of two Flourensia species
(Pergamon-Elsevier Science Ltd, 2004-07)
The MeOH extract of aerial parts of Flourensia riparia Grisebach (Asteraceae) afforded a sesquiterpene lactone, 4beta-hydroxy-4,10alpha-dimethyl-7alphaH,8alphaH-eudesman-11-ene-8,12-olide, together with septuplinolide, its ...
Unusual terpenylated acylphloroglucinols from Dryopteris wallichiana
(Pergamon-Elsevier Science Ltd, 2012-08)
Four unusual terpenylated acylphloroglucinols were isolated from the diethyl ether extract of the scales and rhizomes of the fern Dryopteris wallichiana together with the known compounds albaspidins AA and AB, and filixic ...
Terpenoids from Microliabum polymnioides
(Pergamon-Elsevier Science Ltd, 2004-09)
The phytochemical study of M. polymnioides led to the isolation of two sesquiterpene lactones namely: 11aH-dihydrozaluzanin E and 1b-hydroxy-4-oxo-11bH-4-noreudesman-6,12-olide. Their structures were determined by spectroscopic ...
Prenylflavonoids from Flourensia fiebrigii
(Pergamon-Elsevier Science Ltd, 2007-05)
Three compounds: (2S)-8-(3″-methylbut-2″-enyl)-7,3′,4′-trihydroxyflavanone, (2S)-8-(3″-methyl-4″-hydroxy-but-2″-enyl)-7,3′,4′-trihydroxyflavanone and (2S)-8-(3″-methyl-4″-hydroxy-but-2″-enyl)-5,3′,4′-trihydroxy-7-methoxyflavanone, ...
Fast screening of low molecular weight compounds by thin-layer chromatography and "on-spot" MALDI-TOF mass spectrometry
(Amer Chemical SocWashingtonEUA, 2004)
Easy ambient sonic-spray ionization mass spectrometry combined with thin-layer chromatography
(Amer Chemical SocWashingtonEUA, 2008)