THE TERPENOIDS OF MAYTENUS-BOARIA MOL (CELASTRACEAE)

The known triterpenoids beta-amyrin ( = olean- 12-en-3beta-ol; 22), lu peol ( = lup-20(29)-en-3beta-ol; 17), betulin ( = lup-20(29)-ene-3beta ,28-diol; 18), lup-20(29)-ene-3beta,30-diol (20), oleanolic acid ( = 3 beta-hydroxyolean-12-en-28-oic acid; 21), and betulonic acid ( = 3-oxo lup-20(29)-en-28-oic acid; 19), together with epicatechol ( = xyphenyl )-3,4-dihydro-2H-1-benzopyran-3,5,7-triol; 23), 5'-O-methylgallocatech ol ( = xyphenyl)-3,4-dihydro-2H-1-benzopyran-3,5,7-triol; 24), and 4-h ydroxybenzaldehyde were isolated from the aerial parts of Maytenus boa ria (MOL.). Additonally, the eight 4,C4-dihydro-beta-agarofuran sesqui ter-penoids 1-8, one of them a diol with a (4R)-configuration, and com pound 9 were present in the extract. The structures of these compounds were established by spectroscopic and chemical means.