Molecular formula: C9H13O3N Features: white powder, no smell, bitter taste; gradually oxygenized after contacted with air or sunshine, and turn light pink, finally turn to brown. It is unstable in neutral and alkali solvent. It is seldom dissolved in water. Usage: It can activate αand β epinephrine captors. Mainly used as medicine to excite heart, strengthen shrink of cardiac muscle, quicken the cardiac rate; shrink skin, membrane and blood vessel of inside. Make blood pressure higher; expand cornonary artery, improve blood supply for heart