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Antibacterial and Antioxidant Activities of Ursolic Acid and Derivatives

The influence of ursolic acid and its derivatives on the susceptibility of some bacterial pathogens to the aminoglycosides antibiotics neomycin, amikacin, kanamycin and gentamicin was evaluated.
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Triterpenes and flavonoids from Combretum leprosum

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Biflavonoids and a glucopyranoside derivative from Ouratea semiserrata.

Two new biflavonoids and the norsesquiterpene 6,9-dihydroxymegastigma-4,7-dien-3-one, have been isolated from leaves and branches of Ouratea semiserrata.
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Chemical Constituents and Larvicidal Activity of Hymenaea courbaril Fruit Peel

The chemical compositions of the essential oils from the peel of ripe and unripe fruits of Hymenaea courbaril L., obtained by hydrodistillation, were analyzed by GC and GC-MS and the first report of this sesquiterpene caryolane-1,9β-diol was reported, to the best of the authors' knowledge.
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Pyrrolizidine alkaloids from Heliotropium indicum

Helindicine (1), a new pyrrolizidine alkaloid with unusual structural features, together with the known lycopsamine (2), were isolated from the roots of Heliotropium indicum (Boraginaceae). The…
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Cytotoxic activities against Ehrlich carcinoma and human K562 leukaemia of alkaloids and flavonoid from two Solanum Species

Diversas especies do genero Solanum apresentam glicoalcaloides e flavonoides com grande variedade de atividades biologicas. O flavonoide tiliroside (1), uma fracao rica em glicoalcaloides denominada…
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Two known bis‐indole alkaloids isolated from Tabernaemontana laeta: complete 1H and 13C chemical shift assignments

An NMR study of two known bis‐indole alkaloids is described. In addition to conventional 1D NMR methods, 2D shift‐correlated NMR experiments [1Hx1H‐COSY, 1Hx13C‐HMQC‐1J(C,H), 1Hx13C‐HMBC‐nJ(C,H) (n =…
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Constituents and antioxidant activity of two varieties of coconut water (Cocos nucifera L.)

Uma analise dos componentes da agua-de-coco (Cocos nucifera L.) de duas variedades da fruta (verde e amarelo) por hidrodestilacao e extracao com solvente, mostrou a presenca de alcoois, cetonas,…
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Quinones from plants of northeastern Brazil: structural diversity, chemical transformations, NMR data and biological activities

The present review focus in quinones found in species of Brazilian northeastern Capraria biflora, Lippia sidoides, Lippia microphylla and Tabebuia serratifolia. The review cover ethnopharmacological…
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Iridoid glucoside and antifungal phenolic compounds from Spathodea campanulata roots

O estudo quimico das cascas das raizes de Spathodea campanulata (Bignoniaceae) conduziu ao isolamento de um irioide glicosilado (ajugol) e dois derivados fenolicos (acido p -hidroxi-benzoico e p…
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