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Triterpene trimers from Maytenus scutioides: cycloaddition compounds?
A G González1, N L Alvarenga, I L Bazzocchi
1Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, 38206 La Laguna, Tenerife, Canary Islands.
Journal of Natural Products
|September 10, 1999
Abstract:
Two novel trimers, triscutins A and B (1 and 2), based on pristimerin triterpene units, were isolated and characterized from Maytenus scutioides. Their structures were determined on the basis of spectroscopic evidence, including 1H-13C heteronuclear correlation (HMQC), long-range correlation with inverse detection (HMBC), and ROESY NMR experiments; and their absolute configurations, by means of CD studies. Compounds 1 and 2 were assayed for antimicrobial and cytotoxic activities, and their possible biosynthetic route is proposed.