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New phenolic and quinone-methide triterpenes from Maytenus amazonica
H Chávez1, A Estévez-Braun, A G Ravelo
1Instituto Universitario de Bio-Orgánica "Antonio González", Universidad de La Laguna, Avda. Astrofísico Fco. Sánchez 2, 38206, Tenerife, Canary Islands, Spain.
Journal of Natural Products
|March 30, 1999
Abstract:
The new nortriterpene methylene quinones amazoquinone (1) and (7S, 8S)-7-hydroxy-7,8-dihydro-tingenone (2), and the new norphenolic triterpenes 7,8-dihydro-6-oxo-tingenol (3), 23-nor-6-oxo-tingenol (4), and 23-oxo-iso-tingenone (5) were isolated from Maytenus amazonica. Their structures were elucidated by spectroscopic methods. Compounds 1, 2, 3, and 5 showed low antitumor activity against four cancer cell lines.