Cyclovirobuxine D is white or light yellow crystal or powder,which is extracted from the medicinal plants Buxus Sinica(Rehd.et wils.)Cheng,etc.Actions and indications :to improve comary circulation and the body ability of resistance to oxygenlack,to protect body from cardiogmus and arrhythmia.Used in cardiogmus induced by coromary atheroselerosis. storage:to preserve in light-resistant and wellclosed containers. preparations:Cyclovirobuxine tablets.