English name:Doxofylline CAS:69975-86-6 Molecular formula:C11H14N4O4 Molecular weight:266.25 Specification:25kg/bag Registration number:Y20170001273 Registration state:A Doxofylline, a derivative of methylxanthine, is a bronchodilator that acts directly on the bronchus and relaxes the smooth muscle of the trachea. Doxofylline can inhibit asthma by inhibiting phosphodiesterase in smooth muscle cells and relaxing smooth muscle.