Now showing items 1-10 of 118
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 ...
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 ...
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 ...
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]
Clerodane diterpenes from leaves of Casearia sylvestris swartz
(Química Nova, 2007-09-01) [Artigo]
Ethanolic extracts of the leaves of Casearia sylvestris yielded a novel clerodane diterpene, 15-hydroxy-3-cleroden-2-one, together with the known diterpenes (-)-hardwickiic acid, reported for the first time from this ...
Cryptomoschatone D2 from Cryptocarya mandioccana: cytotoxicity against human cervical carcinoma cell lines
(Revista de Ciências Farmacêuticas Básica e Aplicada, 2009) [Artigo]
Among the substances isolated from Cryptocarya sp, some styrylpyrones, such as goniothalamin, demonstrate antiproliferative activity in a broad range of human cell lines. In the present study, we assessed the cytotoxicity ...
Composition and antifungal activity of essential oils from Piper aduncum, Piper arboreum and Piper tuberculatum
(Química Nova, 2006-05-01) [Artigo]
The composition of essential oils from leaves, stems and fruits of Piper aduncum, P arboreum and P. tuberculatum was examined by means of GC-MS and alltifungal assay. There was a predominance of monoterpenes in P aduncum ...
Antifungal amides from Piper hispidum and Piper tuberculatum
(Phytochemistry, 2000-11-01) [Artigo]
Piper hispidum and Piper tuberculatum accumulate amides bearing isobutyl, pyrrolidine, dihydropyridone and piperidine moieties. The isolation and characterization of several representatives including two hitherto unreported ...