Contribuição ao estudo de espécies da familia Rubiacvea: Fitoquímica da espécie Amuaioua guianensis Aulb
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Data
2009-06-05
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Universidade Federal de Goiás
Resumo
Amaioua guianensis Aulb is a shurb best known as marmelada-brava or
marmelinho-vermelho belonging to Rubiaceae family. Amaioua genus comprise
10 species which are distributed through Floresta Amazônica, Cerrado,
Pantanal and Mata Atlântica. No phytochemical work has been reported on the
leaves and bark of A. guianensis. As part of our ongoing search for new
compounds from higher plants we undertaken and investigation of the ethanolic
extract of A. guianensis as well as their antioxidant na molluscicidal activity. In
this study we describe the isolation and structural elucidacion of a new
conpound, a cyclopeptide (2), and twelve known compounds: a coumarin (1),
two pentacyclic triterpene (3 and 4), mannitol (5), ethylglucose (6), three
chorogenic acids (7, 8 and 9), two proanthocyanidins (10 and 11) and two
steroids (12 and 13).
The crude ethanolic extract, its purified fractions soluble in n-hexane,
ethylacetate and methanolic, besides compounds 10 and 11 promptly reacted
with DPPH leading to a loss of 50% in the absorbance activity in the
concentrations of 78, 25, 246 and 4 μg/mL, respectively. The results of the
molluscicidal assays with the crude ethanolic extract and its fractions indicated
that ethylacetate fractions is the most active fraction with LC100 100 ppm and
LC50 42,5 ppm
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Citação
OLIVEIRA, Pollyanna Laurindo de. Contribution to the study of species of the family Rubiacvea: Phytochemistry species Amuaioua guianensis aulb. 2009. 111 f. Dissertação (Mestrado em Educação em Química) - Universidade Federal de Goiás, Goiânia, 2009.