• Natural Product Sciences
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• v.18 no.1
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• pp.22-25
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• 2012

Five triterpenoids, epifriedelanol (1), friedelin (2), lupeol (3), ${\beta}$-sitosterol (4), daucosterol (5), and one phenyl propanoids ester, trans-docosanoyl ferulate (6) were isolated from the whole parts of Portulaca oleracea. They were determined using a combination of spectroscopic analyses ($^1H-$, $^{13}C$-NMR, and MS data) and evaluated for their cyclooxygenase inhibitory activity. Compound 6 exhibited inhibitory effect with $IC_{50}$ values of $40.2{\mu}M$ and 1.6 mM on COX-1 and COX-2 activities, respectively.