Resumen

SILVA, Ana Paula Freitas da; PALMEIRA JUNIOR, Sebastião Ferreira; CONSERVA, Lucia Maria  y  GUILHON, Giselle Maria S. Pinheiro. Two Dibenzylbutyrolactol Derivatives and Other Chemical Constituents from Aristolochia peltato-deltoidea. J. Braz. Chem. Soc. [online]. 1999, vol.10, n.2, pp. 122-126. ISSN 0103-5053.  http://dx.doi.org/10.1590/S0103-50531999000200009.

The hexane extract from the aerial parts of Aristolochia peltato-deltoidea Hoehne (Aristolochiaceae) afforded two new epimeric lignans of the type dibenzylbutyrolactol, rel-(8R, 8’S, 9S)-3,4-dimethoxy-3’,4’-methylenedioxy-9b-ethoxy- and rel-(8R, 8’S, 9R)-3,4-dimethoxy-3’,4’-methylenedioxy-9a-ethoxy-lignans-8.8’,9.O.9’, besides a benzofuran neolignan, known as eupomatenoid-7, a-tocopherylquinone, b-sitosterol and stigmasterol. From the chloroform extract were isolated two diastereomeric dibenzylbutyrolactone lignans: rel-(8R, 8’R)- and rel-(8R, 8’S)-3,4-dimethoxy-3’,4’-methylenedioxy-9-oxo-lignans-8.8’,9.O.9’. Chemical composition analysis by GC/MS of the non polar fractions from the hexane extract was also carried out and ten components were identified. The structures of the isolated compounds were elucidated utilizing spectrometric methods.

Palabras llave : Aristolochia peltato-deltoidea; Aristolochiaceae; benzofuran neolignan; dibenzylbutyrolactol lignans; a-tocopherylquinone.