<qa>  What is the name of the drug used in chemotherapy?RATIONALE: Drugs used in chemotherapy, such as doxorubicin, work in different ways to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. Chemoembolization kills tumor cells by carrying drugs directly into the tumor and blocking the blood flow to the tumor. Sorafenib tosylate may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth and by blocking blood flow to the tumor. It is not yet known whether transarterial chemoembolization using doxorubicin-eluting beads is more effective when given with or without sorafenib tosylate in treating patients with liver cancer that cannot be removed by surgery. 