Results 11 to 20 of about 12,097 (227)

Aspidosperma de Guyane : alcaloïdes de Aspidosperma marcgravianum [PDF]

Journal of Natural Products, 1983
Ahond, A., Jacquemin, Henri, Jollès, C. (collab.), Jousselin, A. (collab.), Potier, P., Poupat, C., Robert, G.M.T.   +6 more
core   +3 more sources

Total Synthesis of the Spirocyclic Bis-Indole Alkaloid (-)-Owerreine via a [4+2] Annulation. [PDF]

Angew Chem Int Ed Engl
The total synthesis of the bis‐indole alkaloid (−)‐owerreine has been accomplished by a diastereoselective [4+2] annulation between an enamine and an α,β−unsaturated indolenine precursor to form the 3‐spirocyclic tetrahydropyridine linkage of the natural product. DFT calculations allow an understanding of the mechanism of the key annulation.
Coll E, Gandon V, Kouklovsky C, Evanno L, Vincent G.   +4 more
europepmc   +3 more sources

Stereochemical insights into sarpagan and akuammiline alkaloid biosynthesis. [PDF]

New Phytol
Summary Sarpagan and akuammiline monoterpenoid indole alkaloids (MIAs) are a class of bioactive plant‐derived compounds with significant pharmaceutical potential. These alkaloids are formed through oxidative cyclization of geissoschizine, catalyzed by homologous cytochrome P450 monooxygenases (CYP) known as sarpagan bridge enzymes (SBEs) and rhazimal ...
Mann SGA, Paz-Galeano M, Shahsavarani M, Perley JO, Guo J, Garza-Garcia JJO, Qu Y.   +6 more
europepmc   +2 more sources

Quantifying the Spatial Footprint of Agriculture-Driven Edge Effects in a Global Deforestation Hotspot. [PDF]

Glob Chang Biol
Tropical dry forests face increasing pressure from agricultural expansion, but how this expansion impacts on remaining forests is unclear. We quantified and mapped agricultural edge effects on tree cover, shrub cover, and above‐ground biomass in the Argentine Chaco, a global deforestation hotspot.
Torrella S, Baumann M, Pratzer M, Aguiar S, Piquer-Rodríguez M, Ginzburg R, Pizarro GG, Kuemmerle T.   +7 more
europepmc   +2 more sources

Alcalóides de Aspidosperma auriculatum Standl [PDF]

, 2003
Species from genus Aspidosperma show the presence of indol alkaloids. From Aspidosperma quebracho-blanco Schlecht quebracacidine was obtained1, from A. olivaceum. Schmutz and Hunziker2 isolated olivacine, among others substances.
BARBOSA, Wagner Luiz Ramos, SOARES, Daniela Cristina, TAVARES, Isabel Cecília de Castro   +2 more
core   +1 more source

Evaluation of acute and subacute toxicity of ethanolic extract and fraction of alkaloids from bark of Aspidosperma nitidum in mice

Scientific Reports, 2021
This study investigated the acute and subacute toxicity of the ethanolic extract (EE) and alkaloid fraction (FA) from A. nitidum. The EE was obtained from trunk bark with ethanol, FA was obtained from the fractionation of EE.
H. P. C. Brígido, E. L. P. Varela, A. R. Q. Gomes, Mirian Letícia Carmo Bastos, André de Oliveira Feitosa, Andrey Moacir do Rosario Marinho, L. A. Carneiro, M. Coelho-Ferreira, M. Dolabela, S. Percário   +9 more
semanticscholar   +1 more source

Alcalóides indólicos isolados de espécies do gênero Aspidosperma (Apocynaceae) Indole alkaloids from species of the Aspidosperma (Apocynaceae) genus

Química Nova, 2007
Species from genus Aspidosperma (Apocynaceae) are popularly employed to treat various diseases. This genus is characterized by the occurrence of indole alkaloids.
Maria de M. Pereira, Rose Lisieux R. P. Jácome, Antônio Flávio de C. Alcântara, Rosemeire B. Alves, Délio S. Raslan   +4 more
doaj   +1 more source

Monitoramento das aplicações químicas de Aspidosperma pyrifolium Mart.

Research, Society and Development, 2022
O artigo tem por objetivo realizar um estudo sobre as aplicações químicas já descritas para a espécie Aspidosperma pyrifolium Mart., da família Apocynaceae, a qual pertence ao bioma Caatinga e tem grande ocorrência nos estados das regiões Norte e ...
Adrielle Chermont da Silva, Érika Dayanne Alves da Silva, C. Costa, Odarlan Correia dos Santos, Bruna Oliveira Alves, Maria Gisely Martins dos Santos, Erika Matias da Silva   +6 more
semanticscholar   +1 more source

Atividade biológica e alcalóides indólicos do gênero Aspidosperma (Apocynaceae): uma revisão Biological activity and indole alkaloids of the genus Aspidosperma (Apocynaceae): a review

Revista Brasileira de Plantas Medicinais, 2009
Embora sejam conhecidas principalmente como fonte de madeira nobre para aplicação na construção de móveis, as espécies do gênero Aspidosperma apresentam muitos estudos na área da fitoquímica e poucos estudos na área da farmacologia. As espécies do gênero
V.B. Oliveira, M.S.M. Freitas, L. Mathias, R. Braz-Filho, I.J.C. Vieira   +4 more
doaj   +1 more source

Uma nova espécie de Aspidosperma da Amazônia [PDF]

Acta Amazonica, 1972
Sinopse O autor apresenta neste trabalho a descrição de Aspidosperma williamsii A. P. Duarte, uma nova espécie de Apocynaceae da Flora Amazônica.
Apparicio Pereira Duarte
doaj   +1 more source