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Triterpenic acids from Eugenia moraviana
A novel triterpene, characterized as 6a-hydroxybetulinic acid, was isolated from the leaves and stems of Eugenia moraviana (Myrtaceae), known in Brazil as Cambui, together with three known compounds,Expand
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Reaction of glycidyl methacrylate at the hydroxyl and carboxylic groups of poly(vinyl alcohol) and poly(acrylic acid): is this reaction mechanism still unclear?
Transesterification and epoxide ring-opening reactions are two mechanism routes that explain chemical modifications of macromolecules by glycidyl methacrylate (GMA). Although the coupling reaction ofExpand
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Evaluation of the molluscicidal and Schistosoma mansoni cercariae activity of Croton floribundus extracts and kaurenoic acid
Lethality of the extracts of Croton floribundus (Euphorbiaceae), a medicinal plant from south Brazil, and of the kaurenoic acid, an isolated compound, and two of its derivatives against adultExpand
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A New tormentic acid derivative from Luehea divaricata Mart. (Tiliaceae)
A methanolic extract from leaves of Luehea divaricata (Tiliaceae), known in Brazil as "acoita-cavalo", yielded two triterpene: a novel characterized as 3b-p-hydroxybenzoyloxytormentic acidExpand
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Qualitative determination of indole alkaloids of Tabernaemontana fuchsiaefolia (Apocynaceae)
This paper describes a fast and efficient procedure to separate and identify indole alkaloids from the ethanolic extract of Tabernaemontana fuchsiaefolia (Apocynaceae). The alkaloidal fractionsExpand
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Structural characterization of saturated pyrrolizidine alkaloids from Heliotropium transalpinum var. transalpinum Vell by NMR spectroscopy and theoretical calculations
The chemical investigation of Heliotropium transalpinum var. transalpinum Vell. (Boraginaceae) led to the isolation of transalpinecine (1), a novel pyrrolizidine alkaloid, in addition to knownExpand
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Antitrypanosomal Activity of Novel Benzaldehyde-Thiosemicarbazone Derivatives from Kaurenoic Acid †
A series of new thiosemicarbazones derived from natural diterpene kaurenoic acid were synthesized and tested against the epimastigote forms of Trypanosoma cruzi to evaluate their antitrypanosomalExpand
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Iridoid glucosides from Bouchea fluminensis
Abstract From the aerial parts of Bouchea fluminensis , a new iridoid glucoside, named boucheoside, along with four known iridoid glucosides, lamiide, lamiidoside, durantoside II, andExpand
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Anti-inflammatory and Antioxidant Activities of Randia Hebecarpa. and Major Constituents
Abstract The methanol extract of Randia hebecarpa. Benth. (Rubiaceae) leaves was evaluated for anti-inflammatory activity using carrageenan- and dextran-induced rat paw edema models. AntioxidantExpand
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Depolymerization of poly(ethylene terephthalate) wastes using ethanol and ethanol/water in supercritical conditions
Chemical recycling of poly(ethylene terephthalate) (PET) in supercritical ethanol has been investigated. In the presence of water, under supercritical conditions (temperature and pressure above 516 KExpand
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