Fig. 3
From: The norpurpureine alkaloid from Annona purpurea inhibits human platelet activation in vitro
![Fig. 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs11658-018-0082-4/MediaObjects/11658_2018_82_Fig3_HTML.gif)
Potency of norpurpureine as an anti-platelet agent. Concentration–response curves for norpurpureine inhibitory actions on agonist-induced platelet aggregations were constructed. Each data point, mean ± SD (n = 5), is presented as the percentage reduction of the maximal amplitude response (versus the control, in the absence of norpurpureine). All measures were taken 10 min after the addition of the stimuli