<i>S</i>-Petasin, the Main Sesquiterpene of <i>Petasites formosanus</i>, Inhibits Phosphodiesterase Activity and Suppresses Ovalbumin-Induced Airway Hyperresponsiveness

<table>Displacement of [<sup>3</sup>H]-rolipram by <i>S</i>-petasin (a) and Ro 20-1724 (b) in high-affinity rolipram binding sites of guinea pig whole brain particulates. Each value represents the mean ± SEM (<i>n</i> = 6–9).</table>

Evidence-Based Complementary and Alternative Medicine

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Figure 4

Figure 4: <i>S</i>-Petasin, the Main Sesquiterpene of <i>Petasites formosanus</i>, Inhibits Phosphodiesterase Activity and Suppresses Ovalbumin-Induced Airway Hyperresponsiveness 

Figure 4 | S-Petasin, the Main Sesquiterpene of Petasites formosanus, Inhibits Phosphodiesterase Activity and Suppresses Ovalbumin-Induced Airway Hyperresponsiveness 