Planta Medica 1998-Dec
A new bioactive norquinone-methide triterpene from Maytenus scutioides.
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By antimicrobial and cytotoxic-guided fractionation, a bioactive norquinone-methide triterpene, 15 alpha-hydroxypristimerin, was isolated from a South American medicinal plant, Maytenus scutioides. Its structure was determined on the basis of spectroscopic evidence. Successful chemical transformation of pristimerin to netzahualcoyene indicates that the 15-hydroxy compounds seems to be a possible percursor of 14(15)-ene-quinone-methide-triterpenoids in the biogenetic pathway.
