Resumen de Saponins from cariniana rubra (lecythidaceae)

Evangelista Lima, Paulo Teixeira de Sousa Filho, Jaime Bastida, Guillermo Schmeda Hirschmann

• español

  Tres saponinas triterpenoidales fueron aisladas de la corteza del tallo de Cariniana rubra Gardner & Miers (Lecythidaceae). Las saponinas que se informan son monodesmosidos y un derivado bidesmosidico del triterpeno ácido 2alfa ,3beta ,23-trihidroxi-12-oleanen-28-oico (ácido arjunolico). Las estructuras propuestas son: ácido 28-beta -glucopiranosil-23-O-acetil arjunolico 1, ácido 3-O-beta -glucopiranosil arjunolico 2 y ácido 28-O-[ alfa -Rhamnopiranosil-(1-> 2)-beta -glucopiranosil] -23-O-acetil arjunolico 3. Los compuestos 1 y 3 se describen por primera vez.

• English

  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 2alpha ,3beta ,23-trihydroxy-12-oleanen-28-oic acid (arjunolic acid). The proposed structures are 28-b -glucopyranosyl-23-O-acetyl arjunolic acid 1, 3-O-beta -glucopyranosyl arjunolic acid 2 and 28-O-[ alpha -Rhamnopyranosyl-(1-> 2)-beta -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.