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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 ethnopharmacologicalExpand
Antimicrobial and Antioxidant Activities of the Essential Oil of Resin of Protium heptaphyllum
The essential oil obtained by hydrodistillation from the fresh resin of Protium heptaphyllum was analyzed by GC/MS. The main constituents were: α-pinene (10.5%), α-phellandrene (16.7%), limoneneExpand
Nematicidal and larvicidal activities of the essential oils from aerial parts of Pectis oligocephala and Pectis apodocephala Baker.
The chemical composition of the essential oils from aerial parts of Pectis apodocephala and Pectis oligocephala were analyzed by GC-MS. The essential oils of these species were predominantlyExpand
Chemical constituents from Lippia sidoides and cytotoxic activity.
Eleven known compounds and a new prenylated naphthoquinone, lippsidoquinone (13), were isolated from ethanol extracts of Lippia sidoides. Their structures were established by a combination of 1D andExpand
Total assignment of 1H and 13C NMR spectra of tectol and tecomaquinone I
Conventional one‐dimensional NMR methods and two‐dimensional shift‐correlated NMR experiments (COSY, HMQC, HMBC) were used for 1H and 13C chemical shift assignments of two naphthoquinone dimersExpand
New isoflavone derivative and other flavonoids from the resin of Amburana cearensis
Phytochemical investigation of the resin of Amburana cearensis A. C. Smith allowed the isolation of a new compound: 3',4'-dimethoxy-1'-(7-methoxy-4-oxo-4H-cromen-3-yl)benzo-2',5'-quinone (1),Expand
Cytotoxic Naphthoquinones from Roots of Lippia microphylla
Abstract A new prenylated naphthoquinone dimer named microphyllaquinone (1), a mixture of 6-methoxy- and 7-methoxy-naphtho[2,3-b]-furan-4,9-quinones (2a/2b) and tecomaquinone I (3), were isolatedExpand
Constituents of the Essential Oil of Lippia microphylla Cham. from Northeast Brazil
Abstract The essential oil from the fresh leaves of Lippia microphylla obtained by hydrodistillation was analyzed by GC/MS. Twelve compounds were identified representing 99.9% of the total componentsExpand