Head for the dove Kojo Cornus acuminata wood plant is endemic to China, a deciduous tree, widely distributed in the Yangtze River and southwest provinces.1966 Monroe E. Wall for the first time the United States stem from extracts of camptotheca isolated camptothecin(CPT), then people found that CPT on gastrointestinal cancer, bladder cancer, liver cancer and leukemia and other malignant tumors have a certain effect. The unique mechanism of anticancer activity of CPT launched a study of CPT in camptotheca ac...