7 documents found, page 1 of 1
New Limonoids from Dictyoloma vandellianum and Sohnreyia excelsa: Chemosystemat...
Sartor,Claudenice F. P.; Lima,Maria da Paz; Silva,Maria Fátima G. F. da; Fernandes,João B.; Forim,Moacir R.; Pirani,José R.Molecular phylogenetic studies separated and united a group of genera that constituted the Spathelia-Ptaeroxylon clade, in which Dictyoloma and Sohnreyia have been included. Our taxonomic interest in the Dictyoloma vandellianum and Sohnreyia excelsa stimulated an investigation of both species searching for limonoids. Leaves from D. vandellianum afforded the new limonoid 1,2-dihydro-1α-hydroxy-8,30-epoxy-cneorin...
Growing knowledge: an overview of Seed Plant diversity in Brazil
Zappi,Daniela C.; Filardi,Fabiana L. Ranzato; Leitman,Paula; Souza,Vinícius C.; Walter,Bruno M.T.; Pirani,José R.; Morim,Marli P.; Queiroz,Luciano P.Abstract An updated inventory of Brazilian seed plants is presented and offers important insights into the country's biodiversity. This work started in 2010, with the publication of the Plants and Fungi Catalogue, and has been updated since by more than 430 specialists working online. Brazil is home to 32,086 native Angiosperms and 23 native Gymnosperms, showing an increase of 3% in its species richness in rela...
Activities of extracts and compounds from Spiranthera odoratissima St. Hil. (Ru...
Terezan,Ana Paula; Rossi,Raquel Andrade; Almeida,Roberta N. A.; Freitas,Taís Garcia; Fernandes,João B.; Silva,M. Fátima das Graças Fernandes daThe study of the Spiranthera odoratissima St. Hil (Rutaceae) branches extracts led to the isolation of the furoquinoline (dictamine, γ-fagarine and skimmianine) and 2-arylquinoli-4-one (1-methyl-2-phenylquinolin-4-one) alkaloids and limonoids (limonexic acid and limonin). The compounds 1-methyl-2-phenylquinolin-4-one and limonexic acid were isolated for the first time from the Spiranthera. These furoquinoline a...
Screening of Trypanosoma cruzi glycosomal glyceraldehyde-3-phosphate dehydrogen...
Leite,Ana C.; Ambrozin,Alessandra R. P.; Castilho,Marcelo S.; Vieira,Paulo C.; Fernandes,João B.; Oliva,Glaucius; Silva,Maria Fátima das G. F. daThe inhibitory activity of crude extracts of Meliaceae and Rutaceae plants on glycosomal glyceraldehyde-3-phosphate dehydrogenase (gGAPDH) enzyme from Trypanosoma cruzi was evaluated at 100 μg/mL. Forty-six extracts were tested and fifteen of them showed significant inhibitory activity (IA % > 50). The majority of the assayed extracts of Meliaceae plants (Cedrela fissilis, Cipadessa fruticosa and Trichilia rama...
Metabólitos secundários de Esenbeckia almawillia Kaastra (Rutaceae)
Barros-Filho,Bartholomeu A.; Nunes,Fátima M.; Oliveira,Maria da Conceição F. de; Andrade-Neto,Manoel; Mattos,Marcos C. de; Barbosa,Francisco G.The phytochemical investigation of the roots of E. almawillia is reported for the first time. Chromatographic fractionation of the methanol extract allowed the isolation of the alkaloids 3,3-diisopentenyl-N-methyl-2,4-quinoldione (1), maculine (2) and 3'-methoxygraveoline (3), (E)-N-isobutyl-3-methoxy-4,5-methylenedioxicinnamoyl amide (4), the flavones gardenine B (5) and nevadensin (6), and the sesquiterpene i...
Terpenoids and Steroids from Trichilia Species
Pupo,Mônica T.; Adorno,M. Angela T.; Vieira,Paulo C.; Fernandes,João B.; Silva,M. Fátima das G. F. da; Pirani,José R.The methanol extract of stems of Trichilia claussenii yielded three new sesquiterpenoids: 14-hydroxyelemol, germacra-10(14)-en-9,11,15-triol and germacra-3,10(14)-dien-9,11-diol-4-carbaldehyde. Two known sesquiterpenoids beta-eudesmol, cryptomeridiol and the triterpenoid 22,25-dihydroxy-9beta,19-cyclolanost-23-en-3-one were also isolated. The dichloromethane extract from the leaves of T. lepidota afforded a mix...
Cycloartane Triterpenoid and Alkaloids from Ameidea SPP
Santos,Celcione S.; Januário,Ana H.; Vieira,Paulo C.; Fernandes,João B.; Silva,M. Fátima G.F. da; Pirani,José R.A new triterpene 3-beta-tiglyl-24-methylcycloartanol jointly with a mixture containing 3beta-hydroxy-urs-12-ene-28-oic and 3beta-hydroxy-olean-12-ene-28-oic acids were isolated from Almeidea coerulea. In addition to the triterpenes five alkaloids were also isolated from the same plant: 7-O-acetylhaplophyllidine, dutadrupine, isodutadrupine, 7-methoxy-8-(3,3-dimethylallyl)-dictamnine and arborinine. From A. rubr...