Now showing items 1-10 of 248
New saponins from the roots of Tocoyena formosa (Rubiaceae)
(Planta Medica, 2008-07-01) [Resumo]
seco-Irldoids from Calycophyllum spruceanum (Rubiaceae)
(Phytochemistry, 2003-09-01) [Artigo]
Three seco-iridoids 7-methoxydidcrrosidc, 6'-O-acetyldiderroside and 8-O-tigloyldiderroside, were isolated from the wood bark of Calycophyllum spruceanum together with the known iridoids loganetin, loganin and the seco-iridoids ...
Synthesis and evaluation of novel prenylated chalcone derivatives as anti-leishmanial and anti-trypanosomal compounds
(Bioorganic and Medicinal Chemistry Letters, 2015-08-15) [Artigo]
Chalcones form a class of compounds that belong to the flavonoid family and are widely distributed in plants. Their simple structure and the ease of preparation make chalcones attractive scaffolds for the synthesis of a ...
Phenylpropanoid glucosides from leaves of Coussarea hydrangeifolia (Rubiaceae)
(Phytochemistry, 2005-08-01) [Artigo]
Phenylpropanoid glycosides, 1 '-O-benzyl-alpha-(L)-rhamnopyranosyl-(1 ''-> 6 ')-beta-(D)-glucopyranoside (1) and alpha-(L)-Xylopyranosyl(4 '', 2 ')-(3-O-beta-(D)-glucopyranosyl)-1 '-O-E-caffeoyl-beta-(D)-glucopyranoside ...
HPLC-DAD method for metabolic fingerprinting of the phenotyping of sugarcane genotypes
(Analytical Methods, 2014-01-01) [Artigo]
Metabolite profiling techniques play an important role in the phenotyping and diagnostic analysis of plants. The complexity of the plant metabolome makes the application of a single extraction and analytical method to all ...
A new antifungal phenolic glycoside derivative and iridoids and lignans from Alibertia sessilis (Vell.) K. Schum. (Rubiaceae)
(Journal of the Brazilian Chemical Society, 2007-12-17) [Artigo]
A new antifungal phenolic glycoside, 3,4,5-trimethoxyphenyl-1-O-β-D- (5-O-syringoyl)-apiofuranosyl-(1→6)-β-D-glucopyranoside (1), together with four known iridoids, geniposidic acid (2), geniposide (3), 6α-hydroxygeniposide ...
Antifungal iridoids from the stems of Tocoyena formosa
(Journal of the Brazilian Chemical Society, 1996-07-01) [Artigo]
A new antifungal iridoid compound, together with three active known iridoids, galioside, galioside aglucone, and apodanthoside, as well as 3-O-beta-D-glucopyranosyl-28-O-beta-D-glucopyranosyl quinovic acid and quercetin- ...
Electrospray ionization mass spectrometry screening of piperidine alkaloids from Senna spectabilis (Fabaceae) extracts: Fast identification of new constituents and co-metabolites
(Journal of the Brazilian Chemical Society, 2005-11-01) [Artigo]
The fragmentation pattern of a homologous series of piperidine alkaloids isolated from S. spectabilis was investigated using electrospray ionization tandem mass spectrometry (ESI-MS/MS). The ESI-MS and ESI-MS/MS analyses ...
Isolation, optimization of production and structure-activity relationship studies of monocillin I, the cytotoxic constituent of Paraphaeosphaeria quadriseptata
(Journal of Antibiotics, 2004-08-01) [Artigo]
Selective DMSO-induced conformational changes in proteins from Raman optical activity
(Physical Chemistry Chemical Physics, 2013-01-01) [Artigo]
The function of a protein is determined by its structure, which is intrinsically related to its solvent environment. Based on this paradigm, there has been a great deal of interest in the role that nonaqueous solvents play ...