Ayanin is a bioflavonoid isolated from Croton schiedeanus Schlecht. Ayanin is a non-selective phosphodiesterase1-4 inhibitor and can be used for the study of respiratory disease,such as allergic asthma et al[1].
Ayanin inhibits interleukin (IL)-4 production from purified basophils with an IC50 value of 2.2 μM[1].
[1]. Fei-Peng Lee, et al. Ayanin, a Non-Selective Phosphodiesterase 1-4 Inhibitor, Effectively Suppresses Ovalbumin-Induced Airway Hyperresponsiveness Without Affecting xylazine/ketamine-induced Anesthesia. Eur J Pharmacol. 2010 Jun 10;635(1-3):198-203.