have shown that the antioxidant, anti-in-ammatory, and
antiproliferative activities may be related to the presence of
-avonoids, terpenes, or phenolic compounds. In Euphorbia
,scheriana, it was shown that antiproliferative activities
were associated with terpenoids [$,]. Duarte et al. [$&]
tested di+erent phenolic compounds that were isolated from
Euphorbia lagascae, Euphorbia tuckeyana, and Pycnanthus
for antiproliferative activity and multidrug-resistant human
cancer cells (MDR). Newman and Cragg [!] showed the
importance of isolating and characterizing the activity from
plant compounds, as at least )"% of chemical therapeutic
agents come from plants.