Cynanchum atratum extractorigin:  growing in hillside meadow,alongside the forest,shrub in Hulunbuir in Inner Mongolia and DaXingAnLing in Heilongjiang province.
chemical ingredient : root contains(cynanchol,C15H24O), compound .containing naphtha and cardiac glacoside.
 Package type: Vacuum plastic bags,2.5kg/bags,10kg/carton,20kg/carton,
25kg/carton.