<qa>  What is the drug used in chemotherapy?Phase II trial to study the effectiveness of combining bryostatin 1 with vincristine in treating patients who have progressive or relapsed non-Hodgkins lymphoma after autologous bone marrow transplantation or autologous stem cell transplantation. Drugs used in chemotherapy such as vincristine use different ways to stop cancer cells from dividing so they stop growing or die. Bryostatin 1 may help vincristine kill more cancer cells by making the cells more sensitive to the drug 