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Pain and Aspirin
Pain and Aspirin

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Figure 10
Figure 10 (a) Structure and (b) model of an arachidonic acid molecule. Note: the five carbon atoms in arachidonic acid highlighted in purple are the ones that end up in the five-membered ring in prostaglandin (Figure 11). The same five carbon atoms are purple in the model.

 6 How does aspirin relieve pain?