CAS: C45H72O10 C45H72O19 C39H62O13 C39H60O14 C39H60O13 Colorless neddle Crystal ,it is extracted from Polygonatum kingianum,i Can inhibit human sperm, the concentration of the compounds in the 2 mg / ml , The movement of sperm> 80% Package type: Vacuum plastic bags,2.5kg/bags,10kg/carton,20kg/carton,25kg/carton.