Wiley InterScience Backfile Collection 1832-2000
Chemistry and Pharmacology
The known triterpenoids β-amyrin (= olean-12-en-3β-ol; 22), lupeol (= lup-20(29)-en-3β-ol; 17), betulin (= lup-20(29)-ene-3β,28-diol; 18), lup-20(29)-ene-3β,30-diol (20), oleanolic acid (= 3β-hydroxyolean-12-en-28-oic acid; 21), and betulonic acid (= 3-oxolup-20(29)-en-28-oic acid; 19), together with epicatechol (= cis-2-(3,4-dihydroxyphenyl)-3,4-dihydro-2H-1-benzopyran-3,5,7-triol; 23), 5′-O-methylgallocatechol (= trans-2-(3,4-dihydroxy-5-methoxyphenyl)-3,4-dihydro-2H-1-benzopyran-3,5,7-triol; 24), and 4-hydroxybenzaldehyde were isolated from the aerial parts of Maytenus boaria (MOL.). Additonally, the eight 4,C4-dihydro-β-agarofuran sesquiterpenoids 1-8, one of them a diol with a (4R)-configuration, and compound 9 were present in the extract. The structures of these compounds were established by spectroscopic and chemical means.
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