Skyherb has developed a method of isolating betulin and betulinic acid from birch bark and has successfully been producing commercial quantities for several years. SPECIFICATION: Sources: Betula platyphylla Used Part: Birch bark Active Ingredients: Betulin, Betulinic acid -Betulin ( CAS NO.: 473-98-3, Molecular Formula: C30H50O2) : 70% , 90% , 98% , tested by HPLC -Betulinic acid ( CAS NO.: 472-15-1, Molecular Formula: C30H48O3) : 50% , 90% , 98% ; tested by HPLC DESCRIPTION: Shelf Life: 36 Months Packing: 1~ 5kg/ bag, 25kgs/ drum Lead Time: In stock Price Terms: T/ T, L/ C at Sight FUCTION: Betulin and betulinic acid are traditional medicine products of the triterpene family that is derived from birch tree bark. Previous research characterized it as an effective inhibitor of human melanoma tumor growth through the induction of apoptosis. Betulin has been shown to help wounds heal faster and cut inflammation. Many cosmetic companies, touting it as a skin toner and restorer, add birch bark extract to various products