When you hear the name Gotu Kola (Centella asiatica) most think of its adptogenic properties. These are well studied and a topic for David Winston (author of Adaptogens: Herbs for Strength, Stamina, and Stress Relief). The other individual is Donnie Yance. Donnie Yance talks of adaptogens and their relation to their use in cancer therapy. His book is called " Adaptogens in Medical Herbalism" We do know that topical and oral administration of Gotu Kola is for wound healing - both surgical and nonsurgical wounds, venous insufficiency as in varicose veins, and pedal edema.
An oral compound of Centella called TTFCA is well tolerated and used. The trierpenoids in Centella are well studied. There have been in vitro studies on the acids found in Centella.
In Japan, one of the oleanolic acid compounds has been marketed and used for treating nonlymphatic leukemia. I do feel that many European countries and the Far East use more natural compounds than we do in the United States. Too many regulations here.