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. acessos em 21 jan. 2012. http://dx.doi.org/10.1590/S0100-40422005000200006." title="1. Estudo fitoquímico e avaliação alelopática de Memora peregrina – "ciganinha" – Bignoniaceae, uma espécie invasora de pastagens em Mato Grosso do Sul">Estudo fitoquímico e avaliação alelopática de Memora peregrina – "ciganinha" – ...
Grassi, Rafaela Ferreira; Resende, Ubirazilda Maria; Silva, Walciane da; Macedo, Maria Lígia Rodrigues; Butera, Ana Paola; Tulli, Elayne de OliveiraABSTRACT - Memora 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 6b-hydroxyipolamiide, hyperin, 3'-O-methylhyperin, 4-hydroxy-N-methylproline, b-sitosterol, a-amirin and b-amirin, and lupeol....
Terpenoid constituents from leaves of Guarea kunthiana
Garcez, Fernanda Rodrigues; Garcez, Walmir Silva; Silva, Ana Francisca Gomes da; Bazzo, Rita de Cássia; Resende, Ubirazilda MariaDas folhas de Guarea kunthiana foram obtidos um novo diterpeno com esqueleto do tipo caurano (ent-caur-16-eno-2-ona), além de oito diterpenos (ent-caur-16-eno, ent-3a- e 3b-hidroxicaur-16-eno, kolavelool, kolavenol, kolavenal, ent-13-epi-óxido de manoíla e (-)-neftenol), quatro sesquiterpenos (alismol, alismóxido, espatulenol e 4b,10a-aromadendranodiol), poliprenol-12 e a- e d-tocoferóis. Kolavenal está sendo r...
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 Marianew triterpene, 3b,6b,21b-trihydroxyolean-12-ene and a new iridoid, 8a-methyl-8b-hydroxy-6b-(3',4'-dimethoxy)benzoyloxy-1 a,3a-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 iridoids, 6-O-p-hydroxybenzoyl...