3 documents found, page 1 of 1
Novos constituintes químicos das cascas do caule de Tabebuia heptaphylla
Garcez,Fernanda Rodrigues; Garcez,Walmir Silva; Mahmoud,Talal Suleiman; Figueiredo,Patrícia de Oliveira; Resende,Ubirazilda MariaA new triterpene, 3beta,6beta,21beta-trihydroxyolean-12-ene and a new iridoid, 8alpha-methyl-8beta-hydroxy-6beta-(3',4'-dimethoxy)benzoyloxy-1 alpha,3alpha-dimethoxy-octahydro-cyclopenta[c]pyran were isolated from the trunk bark of a specimen of Tabebuia heptaphylla (Bignoniaceae) collected in the "Pantanal" of Mato Grosso do Sul, Brazil. Twelve known compounds were also obtained in this work, comprising four i...
Estudo fitoquímico e avaliação alelopática de Memora peregrina - "ciganinha" - ...
Grassi,Rafaela Ferreira; Resende,Ubirazilda Maria; Silva,Walciane da; Macedo,Maria Ligia Rodrigues; Butera,Ana Paola; Tulli,Elayne de OliveiraMemora peregrina (local name: 'ciganinha' - Bignoniaceae) is a weed that often invades pastures in the Brazilian state of Mato Grosso do Sul. From its leaves and subterranean parts, the following compounds were isolated: allantoin (20.7 w/w in subterranean parts), the iridoid 6beta-hydroxyipolamiide, hyperin, 3'-O-methylhyperin, 4-hydroxy-N-methylproline, beta-sitosterol, alpha-amirin and beta-amirin, and lupeo...
Estudo fitoquímico das cascas do caule de Duguetia glabriuscula - Annonaceae, b...
Siqueira,João Máximo de; Ziminiani,Maria Graziela; Resende,Ubirazilda Maria; Boaventura,Maria Amélia DiamantinoThe extract obtained from stem bark of Duguetia glabriuscula - Annonaceae was evaluated by Brine Shrimp Lethality test (BSL). The bioactive compounds, oxobufoline and lanuginosine, two oxoaporphine alkaloids were isolated by activity-guided fractionation. In addition, the compounds asaraldehyde, (+)-allo-aromadendrane-10beta, 14-diol, and two aporphine alkaloids, polyalthine and oliveridine were also obtained.