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Antibacterial phloroglucinols and flavonoids from Hypericum brasiliense.
- L. Rocha, A. Marston, O. Potterat, M. A. Kaplan, H. Stoeckli-Evans, K. Hostettmann
- Biology, MedicinePhytochemistry
- 1 November 1995
Four phloroglucinols have been isolated from a petrol extract of the leaves and flowers of Hypericum brasiliense and were antibacterial against Bacillus subtilis in a TLC bioautographic assay.
Antileishmanial activity of isolated triterpenoids from Pourouma guianensis.
- E. C. Torres-Santos, D. Lopes, +4 authors B. Rossi-Bergmann
- Biology, MedicinePhytomedicine : international journal of…
The results indicate that Pourouma guianensis contains many triterpenoids and some, such as ursolic and oleanolic acids, may serve as lead compounds for new antileishmanial drugs, but chemical modifications may be necessary to avoid unselective cytotoxicity.
An antifungal gamma-pyrone and xanthones with monoamine oxidase inhibitory activity from Hypericum brasiliense.
A new gamma-pyrone (hyperbrasilone), three known xanthones (1,5-dihydroxyxanthone, 5-hydroxy-1-methoxyxanthone and 6-deoxyjacareubin) and betulinic acid have been isolated from a dichloromethane…
More phloroglucinols from Hypericum brasiliense
Three new phloroglucinols have been isolated from a petrol extract of the leaves and flowers of Hypericum brasiliense by spectroscopic methods including two-dimensional-NMR heteronuclear correlations.
Antibacterial Phloroglucinols and Flavonoids from Hypericum brasiliense
Chemical Constituents from Himatanthus articulata
Chemical investigation of Himatanthus articulata (Vahl) Woodson led to the isolation of stigmasterol, sitosterol, cycloartenol, a-amyrin-3b-O-cinnamoyl, b-amyrin-3b-O-cinnamoyl,…
Chamaedrydiol, an ursane triterpene from Marsypianthes chamaedrys
A mixture containing a new triterpene, chamaedrydiol (urs-12-ene-2α,3β-diol), and three known triterpenes (lup-20(29)-ene-2α,3β-diol, castanopsol and epigermanidiol) was isolated from Marsypianthes…
Flavonoids as chemotaxonomic markers for Asteraceae.
- V. Emerenciano, J. S. Militão, +4 authors A. Brant
- Biology, MedicineBiochemical systematics and ecology
- 1 October 2001
Flavonoids have been shown to be good taxonomic markers for Asteraceae and some implications of flavonols, flavones and other types are discussed for tribes and subtribes of Asteraceae.
High-speed countercurrent chromatography as a valuable tool to isolate C-glycosylflavones from Cecropia lyratiloba Miquel.
- R. R. Oliveira, M. C. Moraes, +4 authors M. A. Kaplan
- Chemistry, MedicinePhytochemical analysis : PCA
- 1 March 2003
A new apigeninglycoside, apigenin 6-C-galactosyl-6"-O-beta-galactopyranoside (1), isoorientin, and a mixture of orientin and isovitexin were isolated from leaves of Cecropia lyratiloba by high-speed…
Gradient Elution for Triterpene Separation from Cecropia lyratiloba Miquel by HSCCC
Abstract The triterpenoid pool from the dichloromethane fraction obtained from the methanolic extract of roots of Cecropia lyratiloba Miquel was submitted to CCC using a gradient elution consisting…