Resumo

LIMA, EVANGELISTA; TEIXEIRA DE SOUSA FILHO, PAULO; BASTIDA, JAIME  e  SCHMEDA-HIRSCHMANN, GUILLERMO. SAPONINS FROM CARINIANA RUBRA (LECYTHIDACEAE). Bol. Soc. Chil. Quím. [online]. 2002, vol.47, n.4, pp. 441-447. ISSN 0366-1644.  doi: 10.4067/S0366-16442002000400015.

Three triterpenoidal saponins were isolated from the stem bark of Cariniana rubra Gardner & Miers (Lecythidaceae). The saponins reported are monodesmosides and a bidesmoside derivatives from the triterpene 2a ,3b ,23-trihydroxy-12-oleanen-28-oic acid (arjunolic acid). The proposed structures are 28-b -glucopyranosyl-23-O-acetyl arjunolic acid 1, 3-O-b -glucopyranosyl arjunolic acid 2 and 28-O-[ a -Rhamnopyranosyl-(1® 2)-b -glucopyranosyl] -23-O-acetyl arjunolic acid 3. The structures were elucidated mainly from its NMR spectral data. Compounds 1 and 3 are described for the first time.

Palavras-chave : Cariniana rubra; Lecythidaceae; arjunolic acid derivatives; saponins.