<qa>  What is the name of the drug used in chemotherapy?Phase II trial to study the effectiveness of combining rituximab and rasburicase with combination chemotherapy in treating young patients who have newly diagnosed advanced B-cell leukemia or lymphoma. Monoclonal antibodies such as rituximab can locate cancer cells and either kill them or deliver cancer-killing substances to them without harming normal cells. Drugs used in chemotherapy work in different ways to stop cancer cells from dividing so they stop growing or die. Combining more than one drug with rituximab may kill more cancer cells. Chemoprotective drugs such as rasburicase may protect kidney cells from the side effects of chemotherapy. 