Ayanin is a bioflavonoid isolated from Psychotria serpens . Ayanin is a non-selective phosphodiesterase 1-4 inhibitor and can be used for the study of respiratory disease,such as allergic asthma et al In Vitro Ayanin inhibits interleukin (IL)-4 production from purified basophils with an IC 50 value of 2.2 μM. MCE has not independently confirmed the accuracy of these methods. They are for reference only. Form:Solid IC50& Target:PDE2A PDE4