Pedro H. Damada; Pedro H. O. Santiago
; Javier Ellena; André L. M. Porto
The graphic shows Penicillium citrinum CBMAI 1186 reducing α,β-unsaturated ketones to γ,δ-unsaturated ketones at 32 ºC and 135 rpm. This demonstrates the regioselective and chemoselective efficiency of the strain, highlighting its potential as a biocatalyst.
Eliane O. SilvaI,*; Herbert J. DiasII,III; Anderson R. M. OliveiraIII; Antônio E. M. CrottiIII
Methyl trans-ferulate was converted into the dihydrobenzofuran neolignan trans-dehydroferulate dimethyl ester with good enantioselectivity using an advantageous approach based on Trametes versicolor FC.
Renata Rodrigues da Silva RobainaI,*; Gabriela DinisII; Lucas Silva AbreuII
; Raimundo Braz-FilhoI,III; Ivo José Curcino VieiraI
The phytochemical study of Trichilia hirta Linneaus (Meliaceae) seeds resulted in the isolation and identification of a new limonoid named Hirtinol A, in addition to a mixture of 21α-melianone and 21β-melianone, and the glycoside schumaniofioside A.
Nathalia F. QuintilianoI,II; Sávio R. SoaresII; Miriam UemiI; Guilherme M. AntarIII; Patricia SartorelliII; Andre G. TemponeIV;
João Henrique G. LagoI,*
Bioactive hexane extract from leaves of Piper crassinervium was subjected to a bioactivity-guided fractionation to afford five metabolites (1-5). Compound 5 is previously undescribed while compounds 1, 2 and 4 are being described for the first time in P. crassinervium. Compounds 1-5 were evaluated against trypomastigote forms of parasite Trypanosoma cruzi whereas their toxicity was evaluated against NCTC cells.
Brenda K. M. SousaI; Talita L. N. GonçalvesI; Lívia M. DutraI; Victória L. A. SantosII; Emmanoel Vilaça CostaIII
;
Agnaldo R. M. ChavesIV, José M. PintoIV, Marcelo F. R. SilvaV; Yuri M. NascimentoV; Josean F. TavaresV; Marcelo S. SilvaV;
Jackson R. G. S. AlmeidaI,*
Seven compounds, belonging to the flavonoid, phenylpropanoid and chromone classes, were isolated from the leaves of Eriodictyon californicum. Among the isolated compounds, ethyl cinnamate (6) and 5-hydroxy-7-methoxychromone (7) are being reported for the first time in E. californicum and in the Boraginaceae family.
Alice M. S. de Almeida; Tchiara M. A. Tenório; Lucas V. B. Rodrigues; Carolina A. de Araujo; Claudio A. G. da Camara*;
Marcilio M. de Moraes
The analysis of essential oils from three Thunbergia species revealed differences in their chemical profiles, but all contained sesquiterpenes as the predominant compounds. The oil from T. erecta demonstrated the highest efficacy in the DPPH (2,2-diphenyl-1-picrylhydrazyl), ABTS (2,2-azino-bis-3-ethylbenzothiazoline-6-sulphonic acid), AChE (acetylcholinesterase), and BuChE (butyrylcholinesterase) assays.
Yan R. RoblesI; Ricardo VessecchiI; Ivo J. C. VieiraII; Raimundo Braz-FilhoII,III,#; Antonio E. M. CrottiI,*
The fragmentation of deprotonated aspidospermine, aspidocarpine, demethoxypalosine, and aspidolimine was investigated in this work using negative electrospray ionization tandem mass spectrometry.
Thalya S. R. NogueiraI,*; Thiago C. SardouII; Julio Cesar Thurler JúniorII; Gabriela DinisIII; Vinícius D'avila B. PascoalII;
Lucas S. AbreuIII; Raimundo Braz FilhoI,IV; Aislan C. R. F. PascoalII; Ivo José C. VieiraI
Tabernaemontana hystrix (Apocynaceae) root bark showed antiproliferative potential against the HeLa cell line. Six alkaloids were isolated from EtOAc or BuOH fractions. Compounds 3 and 4 are being reported for the first time in the species, and compound 6 is new in the literature.
Janderson Barbosa Leite de AlbuquerqueI; Otemberg Souza ChavesI; Wallace Amorim Machado de QueirozI;
Bárbara Fernandes Araújo RodriguesII; Diégina Araújo FernandesIII; Fábio Correia SampaioIV; Maria de Fátima AgraV; Maria de Fátima Vanderlei de SouzaI,II,*
A phytochemical investigation of the aerial parts of Pavonia malacophylla resulted in the isolation and identification of eighteen compounds, revealing antimicrobial potential in its extract, fractions and isolated compounds.
Fábio G. de Souza; Gabriel S. Crispim; Luana da C. Moreira; Cecilia V. Nunez*
Main databases used to search for articles about Remijia, and some of their biological activities and chemical substances.
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